Find the inflection points,if any,of the following function.Otherwise,answer no solution?

题目

Find the inflection points,if any,of the following function.Otherwise,answer no solution?
f(x) = x^4 - 2x^3 +5
f(x) = 2/(1+x^2)

答案

f'(x) = 4x³ - 6x² f"(x) = 12x² - 12x = 12x(x - 1) =  0x = 0 or x = 1x < 0,f"(x) > 00 < x < 1,f"(x) < 0f(0) = 5,(0,5) is one inflection pointx {%...