Question

how do you find the absolute maximum value for:

f(x) = 11x -2xlnx and x > 0 ?

Answer 1

Take the derivative and set it equal to 0. Then solve for x.

Answer 2

Take the derivative and set it equal to 0. Then solve for x.

Answer 3

^thanks for telling us, FMP

Answer 4

WTF LOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOL

Answer 5

I know we are supposed to take the derivative, however how do you do it with the 2xlnx?

Answer 6

Product rule.

Answer 7

Use product rule. You get 2 + 2lnx

Answer 8

i give up...

Answer 9

so the first derivative and that would be

11 - 2(lnx) - 2x(lnx) ?

Answer 10

11 - 2 - 2lnx

Answer 11

Or: 9-2lnx

Answer 12

can you show me how to get the 2 - 2lnx using the product rule?

Answer 13

Sure