am i right?

[Dennis9]

Find all values of x for the given function where the tangent line is horizontal.

f(x) =

The values I am getting are 0 and -5 is this right?

 

[stapel]

The values I am getting are 0 and -5 is this right?

I'm not getting those values, though I think you're close....

Please reply showing your steps.

Thank you.

Eliz.

 

[Dennis9]

5 and -5

 

[stapel]

5 and -5

Okay... maybe you're not close...?

Please reply showing your steps and reasoning.

Thank you.

Eliz.

 

[Gene]

Half right. Not 0.
f'(x)=.5(2x+10)/(x^2+10x+31)^(3/2)
2x+10=0 only at x=-5.

 

[Unco]

I wonder how many users this morning have the same IP, Ted? (Same image webhost . . .)

 

[stapel]

I wonder how many users this morning have the same IP, Ted?

It is getting distinctly weird... :shock:

Eliz.