Question

(｀・ω・´)

求這題

zu
dopted
limit
= 3
470
+ fixo) nino
Let f: R→ R, f(x + h) = f(x)f(h) and f(0) 0. Prove that
(a) f(0) = 1 and
[(b) if f'(0) exists, then f'(x) does exist for all x ER and f'(x)
ƒ(x) · ƒ'(0).
x² cos
x
sinx