Let f(x)=limn→∞xn1+xnf(x) = \lim_{n \to \infty} \frac{x^n}{1+x^n}f(x)=limn→∞1+xnxn for x≥0x \ge 0x≥0. Where is f′(x)f'(x)f′(x) undefined?
x=1x=1x=1
x=0x=0x=0
x=ex=ex=e
Everywhere