条件 F(x+y) = F(x) × F(y)
lim(y->0) [F(x+y) - F(x)] / y
= lim(y->0) [F(x)F(y) - F(x)F(0)] /y
= F(x) lim(y->0) [F(y) - F(0)] / y
= F(x) * F '(0)
即证.
条件 F(x+y) = F(x) × F(y)
lim(y->0) [F(x+y) - F(x)] / y
= lim(y->0) [F(x)F(y) - F(x)F(0)] /y
= F(x) lim(y->0) [F(y) - F(0)] / y
= F(x) * F '(0)
即证.