Posted by AM on Tuesday, February 5, 2013 at 11:20am.
log2(1/MN) = -log2(MN) = -(log2M + log2N)
log4(3)-log4(48) = log4(3/48) = log4(1/16) = log4(4^-2) = -2
loga(x) = 3/2 loga(9) + loga(2)
loga(x) = loga(27*2)
x = 54
logb(x^2+7) = logb(16)
x^2+7 = 16
x^2 = 9
x = ±3
loga(3x+5)-loga(x-5) = loga(8)
loga((3x+5)/(x-5)) = loga(8)
(3x+5)/(x-5) = 8
x = 9
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