Question

\[f(x)=x ^{2}-8 \ln(x)\]
where ln denotes the natural logarithm function. a)found intervals of increase and decrease b) calculates the absolute and relative extremes of the function f c) concavity and convexity

Answer 1

f'(x) nikalo...

Answer 2

is the problem

Answer 3

f(x)= 2x-8/x
then?

Answer 4

set it <0 and >0

Answer 5

hmmm k

Answer 6

If f'(x)>0 for all x belongs to I , then f is increasing on I.
If f'('x)<0 for all belongs to I, then f is decreasing on I.

Answer 7

f(x)= 2x-8/x=0
how can find point

Answer 8

f(x)= 2x-8/x=0
2x-8=x
2x-x-8=0
x-8=0
x=8
is correct??

Answer 9

@Yahoo!

Answer 10

no its not correct...

Answer 11

i got it

Answer 12

:)

Answer 13

ok

Answer 14

:)