1. ## First Deivative

Can anyone help solve the below by First Principles

sqrt x-1 using formula F(x) = (X+H) - f(x) / H

2. ## Re: First Deivative

Originally Posted by amle
Can anyone help solve the below by First Principles

sqrt x-1 using formula F(x) = (X+H) - f(x) / H
$\dfrac{{\sqrt {x + h} - \sqrt x }}{h} = \dfrac{1}{{\sqrt {x + h} + \sqrt x }}$