Given that log2=r, and log3=s, express the following in terms of r and s.

log18 and log15

I think I did the first one right, but I'm not sure

=log(3x3x2)

=log3+log3+log2

=s+s+r

=2s+r

But I'm not sure how to do the second one.

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- October 21st 2011, 03:28 PMbrian890Solving Log
Given that log2=r, and log3=s, express the following in terms of r and s.

log18 and log15

I think I did the first one right, but I'm not sure

=log(3x3x2)

=log3+log3+log2

=s+s+r

=2s+r

But I'm not sure how to do the second one. - October 21st 2011, 05:19 PMSorobanRe: Solving Log
Helo, brian890!

Quote:

Given that: . ,

express the following in terms of and .

I think I did the first one right, but I'm not sure

Right!

Quote:

I assume these logs are base-ten.

We have: .

. . . . . . . . . . . . . . .

. . . . . . . . . . . . . . .