# Differentiation 2

Calculus Level 3

Suppose $$f:\mathbb R\Rightarrow \mathbb Z$$ is a function such that $$f(1)= \mathbb 2$$ and $$\ f'(x) = f(x)$$. What is $$\ln(f(2015))$$?

If no such function exists, mark your answer as "None of these."

×