log2 16=4

log2 64=6

4* 16=64

log2 4+log2 16=log 2 64

loga M+loga N=loga MN

Let loga m = b 1m = a b 1.

N=a^b2

MN=a^b 1 * a^b2

=a^(b 1+b2)

Logamn = b1+B2 = logam+logan is defined by logarithm.

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