Can someone help me with this?? I really can't get it :(
http://img542.imageshack.us/img542/2352/webworkma105007umdf1104.png
I have asked it before, the guy gave me the first answer, which was: u-v and its correct

Question

asnaseer · Answer

do you mean "...and its NOT correct"?

anonymous · Answer

It is, but i need the other 3 and I dont know how to do it. I asked my tutor and her answers were not right either.

anonymous · Answer

U-V is the correct answer for the first one. Cause Log(2)/Log(5) (I think it was) is = log(.4)

anonymous · Answer

The same guy on OpenStudy that gave me the first answer, told me the answer for the second one:-2u, but it was wrong. That's what my tutor got too, and it was wrong.

asnaseer · Answer

ok, what you need to do is express each one in terms of just log(2) and log(5), so we have for (b):$$log(0.25)=log(1/4)=log(4^{-1})=-log(4)=-log(2^2)=-2log(2)=-2u$$
follow similar steps for the others.

anonymous · Answer

-2u is wrong :( mentioned it before you posted your answer

asnaseer · Answer

it is not wrong - what makes you think it is wrong?

asnaseer · Answer

try this in wolframalpha: http://www2.wolframalpha.com/input/?i=log%280.25%29%2B2log%282%29

asnaseer · Answer

it shows log(0.25)+2log(2)=0
which means log(0.25)=-2log(2)=-2u

anonymous · Answer

Well its an online homework, and I have an unlimited amount of tries. And it's saying -2u is wrong :(

anonymous · Answer

Other than that, the past 2-3 people i have had try it for me, they got -2u too.

asnaseer · Answer

then either the online program is wrong or the question is wrong.

anonymous · Answer

I dont know, im going to my teacher tomorrow about it. Thanks, could you help me with the other logrithim question I posted? Wolfram + my tutor could not get it either

asnaseer · Answer

do you mean (c) and (d)?

anonymous · Answer

http://openstudy.com/#/updates/4eb71347e4b0dd9b3515b20a Go to that question