Inflection points are where the curve changes from concave up to concave down (or vice versa) — second derivative changes sign.
Try it
f(x) = x³, find inflection point
f''(x) = 6x. Sign changes at x = 0. Inflection at (0, 0).
Inflection points are where the curve changes from concave up to concave down (or vice versa) — second derivative changes sign.
f(x) = x³, find inflection point
f''(x) = 6x. Sign changes at x = 0. Inflection at (0, 0).