Sunday

April 19, 2015

April 19, 2015

Posted by **Angelina** on Friday, March 9, 2012 at 1:38am.

to find the critical numbers I took the derivative which is 6x^2+6x-120 so divide by 6 to simplify

x^2+x-20=0

so the critical numbers will be (4,0) and (-5,0) but its wrong I don't know y?

- Math -
**Steve**, Friday, March 9, 2012 at 1:33pmYour work looks good to me, but the critical numbers are 4 and -5, not the points you give.

Recall the definition:

A number a in the domain of a given function f is called a critical number of f if f '(a) = 0 or f' is undefined at x = a.

- Math -
**Angelina**, Friday, March 9, 2012 at 2:53pmThnks :)

help please! - f(x)=x+1/x Find all critical numbers. Find where the function is ...

math - If y= (x^2+20)/(x-4) Find all critical Numbers. After get f' i got the ...

Calculus - If y= (x^2+20)/(x-4) Find all critical Numbers. After get f' i got ...

calculus - Hello. I need help finding the open intervals of this equation: f(x)=...

calculus - Hello. I need help finding the open intervals of this equation: f(x)=...

calculus - Please help!! *f(x)= x(x+6)^1/2 find two x intercepts. Then show that...

Calculus - How do you find the critical numbers and the end points of this ...

Calculus - Find the critical numbers of the function g(t)=|5t-7| If you find g'(...

Calculus - Please check, if there is something wrong please explain what I did ...

Math - The critical numbers of the function: f(t)=7t^(2/3)+t^(5/3) f'(t)=14/3t...