Posted by **Brian** on Sunday, December 17, 2006 at 6:51pm.

Find the critical number(s) of f(x)= abs(2x-4)

What is the derivative of abs(2x-4)?

Is it abs(2)?

No. You have to specify the domain of x. At x=2, this function has no derivative.

At x>2, f' = d (2x -4)/dx= 2

at x <2, f'= d(4-2x)/dx= -2

You have to watch for discontinuities on abs functions.

## Answer This Question

## Related Questions

- math - would this be a correct proof of the cauchy-schwartz inequality: abs=...
- extreme value of absolute..... - find the extreme values of the function on the ...
- maths complex numbers - Can abs(28-7w)=7abs(w) be written as abs(w-4)=abs(w) and...
- Calc - This is a piecewise function on one graph: f(x)= 3, -4 <or= x <or= ...
- calculus - Sketch the curve y = x^3 - 12x^2 + 36x I already did the question ...
- Absolute Value and Limits - solve for limits of 1+ and 1- for this function: (x^...
- Calculus - It says find the numbers, if any, at which the given function is ...
- Calculus - Let f(x)= abs of negative abs of x + pi/2 close abs and g(x)= abs of ...
- 12th grade Calculus - It says find the numbers, if any, at which the given ...
- math - So I need to solve this differential equation dy/dx = 1/(x+2) so i solved...

More Related Questions