>>954
○のところは共通。
Lim(○→0){F(a+○)-F(a)/○=F'(a)

Lim(h→0){F(a+3h)-F(a-2h)/h
= 3 * Lim(h→0){F(a+3h)-F(a)/(3h) + 2 * Lim(h→0){F(a-2h)-F(a)/(-2h)
= 3F'(a) + 2F'(a)
= 5