How do I prove the conjecture that

d^(n)y

______ = k^(n) y

dx^(n)

The n are in the same position like 2 in the second derivative, d2y/dx2. And the n on the RHS is an exponent, but the y is not.

I know to use induction but I'm stuck at proving P(k+1),

d^(k+1)y

______

dx^(k+1)

Thank you very much!