Halp please. Medal+fan to best answer
If x=log2 and y=log3 express the following in terms of x and y.... log15

Question

Halp please. Medal+fan to best answer
If x=log2 and y=log3 express the following in terms of x and y....  log15

anonymous · Answer

Are you sure this is the correct problem?  Because, as stated, the problem doesn't really work.

aonz · Answer

yea sure is right

aonz · Answer

i cant figure it out :P

aonz · Answer

is it x^4 - 1
thats all i can get

anonymous · Answer

It doesn't work like that.  Things inside the log work with multiplication, but since you don't have a factor of 5 anywhere, you can't really make this work.

aonz · Answer

well in the back of my maths textbook seems very wrong in what it says(to me) 
y-x+1

anonymous · Answer

That works lol.  I wasn't sure you could use constants.

aonz · Answer

how does that work?

anonymous · Answer

$$
\log(15) \equiv 
\log(\frac{30}{2}) \equiv
\log(30) - \log(2) \equiv
\log(10 * 3) - x \equiv
\log(10) + log(3) - x \equiv
1 + y -x$$

anonymous · Answer

The cut-off part is the answer 1 + y - x

aonz · Answer

oh :) thanks so much ill attempted the remainling questions i got stuck on