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Inflection points calculations

What are the inflection points?

(a) f(x) = 12x^5 +15x^4 -240x^3+19
(One of the inflections is 0. Find the rest. Results cannot be -2.82 and 2.07)

(b) f(x) = (x^2 - 8x + 32)(x-4)

Solution Summary

This shows how to find inflection points of given polynomial functions.

$2.19