Question

If f(X)= e^2In x, then f'(3)=

Answer 1

=e^(lnx^2)

Answer 2

f'x = 2x

Answer 3

I don't understand??

Answer 4

prop of log

Answer 5

so how do you get f'(3)?

Answer 6

put x=3 in f'x =2x

Answer 7

so would the answer be 6:)

Answer 8

???

Answer 9

yups i have shown each and every step\[a^{\log_{a}x } = x\]

Answer 10

Thanks:)

Answer 11

this is property of log whic's being applied

Answer 12

The position of a particle moving along a straight line at any time t is given by s(t)=t^3+9t^2-27. What is the velocity of the particle at the time when the acceleration is zero?

Answer 13

acceleration = s"(t)=0, get a value of t then put in s'(t) which would be velocity

Answer 14

so would s"(t)=6t+18 ?

Answer 15

......then set is equal to 0 to get -3??

Answer 16

yaa there seems something wrong in the question

Answer 17

why?? -3 is an answer choice?

Answer 18

time can not be negative

Answer 19

then how would we get the correct answer?? b/c I'm pretty sure -3 is right......idk though

Answer 20

-3 comes from s"t = 0

Answer 21

yes...

Answer 22

and u've to calculates't at that t at which s"t -0

Answer 23

I set s''t=0......the answer was -3

Answer 24

yaa so t=negative not possible

Answer 25

okay....so do you know what we do from here?

Answer 26

the quest is probably having a mistake.

Answer 27

I read over the ? & everything seems right?...do you want to move to the nxt question? I'll just bubble -3 as my answer...:)

Answer 28

its asking velocity which should be zero at t=-3, velo = -27 from this data

Answer 29

yes....-27

Answer 30

?

Answer 31

r u still there??.....:)