Find the inflection points of f(x)=x/(5x^2+5)^2 List the x-values: I found f''(x) which is f''(x)= 10x/(5x^2+5)^2 I get 0, but this answer is wrong on my online hw thanks
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Originally Posted by Asuhuman18 Find the inflection points of f(x)=x/(5x^2+5)^2 List the x-values: I found f''(x) which is f''(x)= 10x/(5x^2+5)^2 I get 0, but this answer is wrong on my online hw thanks I've got a different second derivative. And consequently 3 zeros of f''(x). Spoiler: $\displaystyle f'(x)=\dfrac{1-3x^2}{5(x^2+1)^4}$ and $\displaystyle f''(x)=\dfrac{12x(x^2 - 1)}{25(x^2+1)^3}$
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