General question about derivative.. When I take my second derivative I usually end up with crazy numbers and I'm asked for the Inflection point
An example of what happens to me is with this function:
x^3/(x^2-16)
I end up with maybe some x^7 and x^5 at the second derivative and its way too much for me to figure out the inflection point... any help?

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I have to write this in parts so bear with me.
d/dx(x^3/(-16+x^2)) = (x^2 (x^2-48))/(x^2-16)^2

(32 x (x^2+48))/(x^2-16)^3 is the second derivative

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