alfira
find the derivative



This Question is Closed

alfira
Best Response
You've already chosen the best response.
1
(3/x)^x

Dido525
Best Response
You've already chosen the best response.
1
Do you know how to use ln differentiation?

alfira
Best Response
You've already chosen the best response.
1
not sure

alfira
Best Response
You've already chosen the best response.
1
you mean add e into it ?

Dido525
Best Response
You've already chosen the best response.
1
No no. Remember one thing. You can only use the power rule if you have a number on the power.

Dido525
Best Response
You've already chosen the best response.
1
Since that's not the case you have to use ln differentiation.

Dido525
Best Response
You've already chosen the best response.
1
Basically it means you take the natural log of both sides.

alfira
Best Response
You've already chosen the best response.
1
e^xIn(3/x)

alfira
Best Response
You've already chosen the best response.
1
is that what you mean?

Dido525
Best Response
You've already chosen the best response.
1
So we have, dw:1355452492770:dw

Dido525
Best Response
You've already chosen the best response.
1
That's what I mean :P .

Dido525
Best Response
You've already chosen the best response.
1
No do you see how we get the power out?

Dido525
Best Response
You've already chosen the best response.
1
dw:1355452563984:dw

shining
Best Response
You've already chosen the best response.
0
put it as power of e
then x e^ (3/x)
result: e^(3/x) + (3/(x)^2)*x

Dido525
Best Response
You've already chosen the best response.
1
@shining : That works too but I prefer my way. Makes more sense to me. I was never good with powers XD .

shining
Best Response
You've already chosen the best response.
0
any way satisfy you!

alfira
Best Response
You've already chosen the best response.
1
but in your way , we have to multiply it by 1/y
at the end right ?

shining
Best Response
You've already chosen the best response.
0
yeah

alfira
Best Response
You've already chosen the best response.
1
got it ` thanks guys

Dido525
Best Response
You've already chosen the best response.
1
dw:1355452766676:dw

Dido525
Best Response
You've already chosen the best response.
1
Now take the derivative.

alfira
Best Response
You've already chosen the best response.
1
got it