Question

find the derivative, f(x)=39x+200/x^2.

Answer 1

help please..

Answer 2

Think of it as \[39x+200x^{-2}\]
Does that help?

Answer 3

oh.. is that possible? i think it can help. thanks..

Answer 4

The derivative of 39x is just 39.
The derivative of 200x^-2
is -400x^-1
i think i'm probably wrong...

Answer 5

i mean -400x^-3*

Answer 6

You always subtract 1 from the exponent, even when it's negative.

Answer 7

yeah my bad , accident

Answer 8

39 - 400x^-3
then?..

Answer 9

then?

Answer 10

as in im asking @SACAPUNTAS if that is correct.

Answer 11

Then you put the negative exponent back into the denominator so your teacher doesn't yell at you for using calculator syntax.

But otherwise, yes.

Answer 12

thanks.