# Math Help - Differentiating from first principles

1. ## Differentiating from first principles

Can someone please help me out with this problem:

Differentiate g(x) = 1.7x - 1.7 from first principles.

I've applied the formula, but am stuck after this step - g'(x) = lim(h->0) 1.7x (1.7h - 1) / h

Thanks.

2. ## Re: Differentiating from first principles

Remember that lim x-> 0 (a^x-1)/x = loga to the base e. And you have the result.