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Finding the limit without L'Hospital?


How to evaluate this limit without using L'Hospital's rule?Finding the limit without L'Hospital's rule.Limit using l'hospitalFinding $lim_xto -2fracx+2sqrt-x-1-1;$ without L'HospitalEvaluating $lim_xto 0fracsin^2x2x^2$ without L'HospitalHint on finding limit without application of L'Hospital's rule (mathematical analysis)How to solve this limit without L'Hospital?Solving the following limit without L'Hospital Rule: $lim_xto1left(x-1right)tanleft(fracpi x2right)$?$lim_x to 2 fraccosleft(fracpixright)x-2$ without using De L'HospitalFinding Limit related to third derivative without L'Hospital













-3












$begingroup$


How to evaluate the limit without using the L'Hospital's rule? I have tried using L'Hospital's rule and got the value as 1.
limit x approaches 0 ((1+2x)-(1+3x)^(2/3))/(x^2)










share|cite|improve this question









New contributor




yalam is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.







$endgroup$







  • 2




    $begingroup$
    Which limit? Please write the problem with MathJax.
    $endgroup$
    – Matti P.
    Mar 12 at 11:19










  • $begingroup$
    Is this $$lim_x to 0frac1+2x-(1+3x)^2/3x^2$$?
    $endgroup$
    – Dr. Sonnhard Graubner
    Mar 12 at 11:25










  • $begingroup$
    Yes! the problem is correct.
    $endgroup$
    – yalam
    Mar 12 at 11:29










  • $begingroup$
    Use Taylor's formula at order $2$ for $(1+3x)^3/2$.
    $endgroup$
    – Bernard
    Mar 12 at 11:38















-3












$begingroup$


How to evaluate the limit without using the L'Hospital's rule? I have tried using L'Hospital's rule and got the value as 1.
limit x approaches 0 ((1+2x)-(1+3x)^(2/3))/(x^2)










share|cite|improve this question









New contributor




yalam is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.







$endgroup$







  • 2




    $begingroup$
    Which limit? Please write the problem with MathJax.
    $endgroup$
    – Matti P.
    Mar 12 at 11:19










  • $begingroup$
    Is this $$lim_x to 0frac1+2x-(1+3x)^2/3x^2$$?
    $endgroup$
    – Dr. Sonnhard Graubner
    Mar 12 at 11:25










  • $begingroup$
    Yes! the problem is correct.
    $endgroup$
    – yalam
    Mar 12 at 11:29










  • $begingroup$
    Use Taylor's formula at order $2$ for $(1+3x)^3/2$.
    $endgroup$
    – Bernard
    Mar 12 at 11:38













-3












-3








-3





$begingroup$


How to evaluate the limit without using the L'Hospital's rule? I have tried using L'Hospital's rule and got the value as 1.
limit x approaches 0 ((1+2x)-(1+3x)^(2/3))/(x^2)










share|cite|improve this question









New contributor




yalam is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.







$endgroup$




How to evaluate the limit without using the L'Hospital's rule? I have tried using L'Hospital's rule and got the value as 1.
limit x approaches 0 ((1+2x)-(1+3x)^(2/3))/(x^2)







limits-without-lhopital






share|cite|improve this question









New contributor




yalam is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











share|cite|improve this question









New contributor




yalam is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









share|cite|improve this question




share|cite|improve this question








edited Mar 12 at 11:35









Bernard

123k741116




123k741116






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asked Mar 12 at 11:19









yalamyalam

61




61




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New contributor





yalam is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.






yalam is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.







  • 2




    $begingroup$
    Which limit? Please write the problem with MathJax.
    $endgroup$
    – Matti P.
    Mar 12 at 11:19










  • $begingroup$
    Is this $$lim_x to 0frac1+2x-(1+3x)^2/3x^2$$?
    $endgroup$
    – Dr. Sonnhard Graubner
    Mar 12 at 11:25










  • $begingroup$
    Yes! the problem is correct.
    $endgroup$
    – yalam
    Mar 12 at 11:29










  • $begingroup$
    Use Taylor's formula at order $2$ for $(1+3x)^3/2$.
    $endgroup$
    – Bernard
    Mar 12 at 11:38












  • 2




    $begingroup$
    Which limit? Please write the problem with MathJax.
    $endgroup$
    – Matti P.
    Mar 12 at 11:19










  • $begingroup$
    Is this $$lim_x to 0frac1+2x-(1+3x)^2/3x^2$$?
    $endgroup$
    – Dr. Sonnhard Graubner
    Mar 12 at 11:25










  • $begingroup$
    Yes! the problem is correct.
    $endgroup$
    – yalam
    Mar 12 at 11:29










  • $begingroup$
    Use Taylor's formula at order $2$ for $(1+3x)^3/2$.
    $endgroup$
    – Bernard
    Mar 12 at 11:38







2




2




$begingroup$
Which limit? Please write the problem with MathJax.
$endgroup$
– Matti P.
Mar 12 at 11:19




$begingroup$
Which limit? Please write the problem with MathJax.
$endgroup$
– Matti P.
Mar 12 at 11:19












$begingroup$
Is this $$lim_x to 0frac1+2x-(1+3x)^2/3x^2$$?
$endgroup$
– Dr. Sonnhard Graubner
Mar 12 at 11:25




$begingroup$
Is this $$lim_x to 0frac1+2x-(1+3x)^2/3x^2$$?
$endgroup$
– Dr. Sonnhard Graubner
Mar 12 at 11:25












$begingroup$
Yes! the problem is correct.
$endgroup$
– yalam
Mar 12 at 11:29




$begingroup$
Yes! the problem is correct.
$endgroup$
– yalam
Mar 12 at 11:29












$begingroup$
Use Taylor's formula at order $2$ for $(1+3x)^3/2$.
$endgroup$
– Bernard
Mar 12 at 11:38




$begingroup$
Use Taylor's formula at order $2$ for $(1+3x)^3/2$.
$endgroup$
– Bernard
Mar 12 at 11:38










2 Answers
2






active

oldest

votes


















0












$begingroup$

$(1+3x)^frac23 ≈ 1 + (2/3)(3x) + 0.5(2/3)(-1/3)(3x)^2$
So, $1 + 2x - (1+3x)^frac23 ≈ x^2$
Hence desired limit is $1$






share|cite|improve this answer










New contributor




Prakhar Neema is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.






$endgroup$












  • $begingroup$
    Thank you for your suggestion. I am still looking for a method without the T-series expansion or differentiation.
    $endgroup$
    – yalam
    Mar 12 at 11:45










  • $begingroup$
    What about binomial series?
    $endgroup$
    – user361424
    yesterday


















0












$begingroup$

Rationalize the numerator using $a-b=dfraca^3-b^3a^2+ab+b^2$ for $ane b$



to find



$$lim_xto0dfrac(1+2x)^3-(1+3x)^2x^2cdotlim_xto0dfrac1(1+2x)^2+(1+2x)(1+3x)^2/3+(1+3x)^4/3==?$$






share|cite|improve this answer









$endgroup$












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    2 Answers
    2






    active

    oldest

    votes








    2 Answers
    2






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    0












    $begingroup$

    $(1+3x)^frac23 ≈ 1 + (2/3)(3x) + 0.5(2/3)(-1/3)(3x)^2$
    So, $1 + 2x - (1+3x)^frac23 ≈ x^2$
    Hence desired limit is $1$






    share|cite|improve this answer










    New contributor




    Prakhar Neema is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.






    $endgroup$












    • $begingroup$
      Thank you for your suggestion. I am still looking for a method without the T-series expansion or differentiation.
      $endgroup$
      – yalam
      Mar 12 at 11:45










    • $begingroup$
      What about binomial series?
      $endgroup$
      – user361424
      yesterday















    0












    $begingroup$

    $(1+3x)^frac23 ≈ 1 + (2/3)(3x) + 0.5(2/3)(-1/3)(3x)^2$
    So, $1 + 2x - (1+3x)^frac23 ≈ x^2$
    Hence desired limit is $1$






    share|cite|improve this answer










    New contributor




    Prakhar Neema is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.






    $endgroup$












    • $begingroup$
      Thank you for your suggestion. I am still looking for a method without the T-series expansion or differentiation.
      $endgroup$
      – yalam
      Mar 12 at 11:45










    • $begingroup$
      What about binomial series?
      $endgroup$
      – user361424
      yesterday













    0












    0








    0





    $begingroup$

    $(1+3x)^frac23 ≈ 1 + (2/3)(3x) + 0.5(2/3)(-1/3)(3x)^2$
    So, $1 + 2x - (1+3x)^frac23 ≈ x^2$
    Hence desired limit is $1$






    share|cite|improve this answer










    New contributor




    Prakhar Neema is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.






    $endgroup$



    $(1+3x)^frac23 ≈ 1 + (2/3)(3x) + 0.5(2/3)(-1/3)(3x)^2$
    So, $1 + 2x - (1+3x)^frac23 ≈ x^2$
    Hence desired limit is $1$







    share|cite|improve this answer










    New contributor




    Prakhar Neema is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.









    share|cite|improve this answer



    share|cite|improve this answer








    edited Mar 13 at 9:10









    YuiTo Cheng

    2,0532637




    2,0532637






    New contributor




    Prakhar Neema is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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    answered Mar 12 at 11:41









    Prakhar NeemaPrakhar Neema

    1074




    1074




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    New contributor





    Prakhar Neema is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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    Prakhar Neema is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.











    • $begingroup$
      Thank you for your suggestion. I am still looking for a method without the T-series expansion or differentiation.
      $endgroup$
      – yalam
      Mar 12 at 11:45










    • $begingroup$
      What about binomial series?
      $endgroup$
      – user361424
      yesterday
















    • $begingroup$
      Thank you for your suggestion. I am still looking for a method without the T-series expansion or differentiation.
      $endgroup$
      – yalam
      Mar 12 at 11:45










    • $begingroup$
      What about binomial series?
      $endgroup$
      – user361424
      yesterday















    $begingroup$
    Thank you for your suggestion. I am still looking for a method without the T-series expansion or differentiation.
    $endgroup$
    – yalam
    Mar 12 at 11:45




    $begingroup$
    Thank you for your suggestion. I am still looking for a method without the T-series expansion or differentiation.
    $endgroup$
    – yalam
    Mar 12 at 11:45












    $begingroup$
    What about binomial series?
    $endgroup$
    – user361424
    yesterday




    $begingroup$
    What about binomial series?
    $endgroup$
    – user361424
    yesterday











    0












    $begingroup$

    Rationalize the numerator using $a-b=dfraca^3-b^3a^2+ab+b^2$ for $ane b$



    to find



    $$lim_xto0dfrac(1+2x)^3-(1+3x)^2x^2cdotlim_xto0dfrac1(1+2x)^2+(1+2x)(1+3x)^2/3+(1+3x)^4/3==?$$






    share|cite|improve this answer









    $endgroup$

















      0












      $begingroup$

      Rationalize the numerator using $a-b=dfraca^3-b^3a^2+ab+b^2$ for $ane b$



      to find



      $$lim_xto0dfrac(1+2x)^3-(1+3x)^2x^2cdotlim_xto0dfrac1(1+2x)^2+(1+2x)(1+3x)^2/3+(1+3x)^4/3==?$$






      share|cite|improve this answer









      $endgroup$















        0












        0








        0





        $begingroup$

        Rationalize the numerator using $a-b=dfraca^3-b^3a^2+ab+b^2$ for $ane b$



        to find



        $$lim_xto0dfrac(1+2x)^3-(1+3x)^2x^2cdotlim_xto0dfrac1(1+2x)^2+(1+2x)(1+3x)^2/3+(1+3x)^4/3==?$$






        share|cite|improve this answer









        $endgroup$



        Rationalize the numerator using $a-b=dfraca^3-b^3a^2+ab+b^2$ for $ane b$



        to find



        $$lim_xto0dfrac(1+2x)^3-(1+3x)^2x^2cdotlim_xto0dfrac1(1+2x)^2+(1+2x)(1+3x)^2/3+(1+3x)^4/3==?$$







        share|cite|improve this answer












        share|cite|improve this answer



        share|cite|improve this answer










        answered 21 hours ago









        lab bhattacharjeelab bhattacharjee

        227k15158275




        227k15158275




















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