## freckles Group Title Use the formal definition of derivative here: Find f'(x) if $f(x)=sqrt{x^4-x}+2$. 2 years ago 2 years ago

$f(x)=\sqrt{x^4-x}+2$
$f'(x)=\frac{d}{dx}\sqrt{x^4-x}+ \frac{d}{dx}(2)$$f'(x)= \frac{1}{2\sqrt{x^4-x}} \frac{d}{dx}(x^4-x)+ 0$$f'(x)= \frac{1}{2\sqrt{x^4-x}} (4x^3-1) \ or \ f'(x)= \frac{4x^3-1}{2\sqrt{x^4-x}}$