Saturday

February 28, 2015

February 28, 2015

Posted by **mkcolema** on Friday, March 13, 2009 at 8:56pm.

How do you find the one critical number??

- math-calc -
**GanonTEK**, Friday, March 13, 2009 at 9:15pmDifferentiate and put equal to zero.

f'[x] = 5e^(2x) + 2e^(2x)(-4+5x)

f'[0] = -3

So the x-coordinate is -3

I'd guess that that is what the question wants.

Hope that helps

- math-calc -
**GanonTEK**, Friday, March 13, 2009 at 9:23pmI made a slight error. i dont want f'[0], i want f'[x] = 0 to find x = something.

so we get 5e^(2x) + 2e^(2x)(-4+5x) = 0

divide across by e^(2x)

we get 5 + 2(-4+5x) = 0

5 - 8 + 10x =0

10x = 3

x = 3/10

Sorry about the mistake in my first post.

hope that helps

**Answer this Question**

**Related Questions**

math-calc - f(x)=2x^3-36x^2+162x-6 small critical number? Large critical number?

pre calc - Find the critical number of the function. g(t) = | 6t - 9 | t =

Calculus - The function f(x) = (9 x+2)e^{-6 x} has one critical number. Please ...

Calc 3 - If a function of one variable is continuous on an interval and has only...

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

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

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

Calc I - Yes I was trying to find the range y = (x^2 -4)/(x^2 - x -12) ok using ...

calc 2 - given x=2cos(t)+t*sin(t) and y=2sin(t)-t*cost(t), with t:[pi, 2pi] find...

calc - find the critical no's/ points in (X^-2)(lnx)