April 19, 2014

Homework Help: Calculus

Posted by Dee on Monday, February 26, 2007 at 10:52am.




There are two ways to do this:
(1) let u = 5x-4, and use the "chain rule", df/dx = df/du * du/dx
(2) expand the polynomial to
f(x) = 25 x^2 -40x + 16
and differentialte it term-by-term.
You will get the same answer either way.

Let's use the first way, because it is something you may need for other problems
u = 5x-4
du/dx = 5
f(u) = u^2
df/dx = df/du * du/dx
= 2 u * 5 = 10(5x -4) = 50x - 40

Answer this Question

First Name:
School Subject:

Related Questions

Differentiation - How do you find f'(x), f''(x) of f(x) =ln (1-x) IF f(x) = ln (...
calculus - I am having trouble with this problem also derivative differentiate f...
Maths - Differentiate using the product rule. How do i get from dy/dx = d(uv)/dx...
calc - correction: 9/25(u+7)u^11 du = 9/25(u^12 + 7 u^11) du and you can easily ...
calculus - find dy/dx y=ln (secx + tanx) Let u= secx + tan x dy/dx= 1/u * du/dx ...
Calculus - can sumeone plz help me find the derivative of (2x^2 - 12x -2) / ((x^...
calculus - i have to integrate using u substitution, but i am not sure if i did ...
math calculus - Hi could someone please explain to me how i would use the chain ...
Calculus - Find the derivative: y=2e^(x^2+1)^3 i have so far 2(2x)e^(x^2+1)^3 Is...
Math integrals - What is the indefinite integral of ∫ [sin (π/x)]/ x^...