Thursday

December 18, 2014

December 18, 2014

Posted by **Derek** on Wednesday, June 27, 2012 at 8:39pm.

After get f' i got the answer -5/4. What did i do wrong or is that the critical number?

- math -
**Steve**, Thursday, June 28, 2012 at 10:42amcritical number: where y'=0 or y' undefined.

Anyway, y' = (x^2-8x-20)/(x-4)^2

y'=0 when x = -2,10

y' undefined when x = 4

how did you come up with -5/4 ?

**Answer this Question**

**Related Questions**

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

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

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

Math - 2x^3+3x^2-120x to find the critical numbers I took the derivative which ...

Math - Find any critical numbers of the function. (Enter your answers as a comma...

Calculus - another question - "Find the absolute minimum value of the function f...

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

Critical Points, Etc. - find the values for a, b, and c such that the function f...

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 ...