# Math Help - Differentiation

1. ## Differentiation

Hey, i have 2 questions in which i need done really soon, any help would be great.

f(x)= (4-x)(5-2x) / x²

You have to find the derivative of that

F(x)= x+1 /2x⅓

The same has to be done with that
Working also has to be showed...
Thanks in advance for any help given

2. Originally Posted by Scotland
f(x)= (4-x)(5-2x) / x²
Work a little this expression

$f(x) = \frac{{(x - 4)(2x - 5)}}{{x^2 }} = \frac{{2x^2 - 13x + 20}}{{x^2 }} = 2 - 13x^{ - 1} + 20x^{ - 2} .$

Now apply the power rule here.

Originally Posted by Scotland
You have to find the derivative of that

F(x)= x+1 /2x⅓
The same, split the fraction in two pieces, and apply the power rule.