what is the limit as x approaches to 1+ of (x^3-1)ln(x-1)^5
1 Answer
We have
\[\lim_{x\rightarrow 1^+} (x^3-1)\ln (x-1)^5=\lim_{x\rightarrow 1^+} \frac{\ln (x-1)^5}{\frac{1}{x^3-1}}\]
\[=\lim_{x\rightarrow 1^+} \frac{5\ln (x-1)}{\frac{1}{x^3-1}}=\lim_{x\rightarrow 1^+} \frac{5\frac{1}{x-1}}{\frac{-3x^2}{(x^3-1)^2}}\]
\[=\lim_{x\rightarrow 1^+} \frac{5(x^3-1)^2}{-3x^2(x-1)}\]
\[=\lim_{x\rightarrow 1^+} \frac{5 [(x-1)(x^2+x+1)]^2}{-3x^2(x-1)}=\lim_{x\rightarrow 1^+} \frac{5 (x-1)^2(x^2+x+1)^2}{-3x^2(x-1)}\]
\[=\lim_{x\rightarrow 1^+} \frac{5 (x-1)(x^2+x+1)^2}{-3x^2}=0.\]

405
-
This took me 15 minutes to answer. Please consider offering bounties/tipping , otherwise you may not get a response for your future questions.
Join Matchmaticians Affiliate Marketing
Program to earn up to 50% commission on every question your affiliated users ask or answer.
- 1 Answer
- 120 views
- Pro Bono
Related Questions
- Need help with finding equation of the plane containing the line and point. Given the symmetric equation.
- Prove that ${n\choose 2}2^{n-2}=\sum\limits_{k=2}^{n}{n\choose k}{k\choose 2}$ for all $n\geq 2$
- Transformations of Parent Functions
- Mechanical principle science (maths)
- Calculus on Submanifolds Challenge
- How to recalculate 2D polygon side lengths when tilt is applied in 3D space?
- Find the extrema of $f(x,y)=x$ subject to the constraint $x^2+2y^2=2$
- Show that the distance between two nonparallel lines is given by $\frac{|(p_2-p_1)\cdot (a_1\times a_2)|}{|| a_2\times a_1||}$