3^a=2,则log3 8-2log 3 6=?

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3^a=2,则log38-2log36=?3^a=2,则log38-2log36=?3^a=2,则log38-2log36=?3^a=2a=log32log38-2log36=log32^3-2log

3^a=2,则log3 8-2log 3 6=?
3^a=2,则log3 8-2log 3 6=?

3^a=2,则log3 8-2log 3 6=?
3^a=2
a=log3 2
log3 8-2log 3 6
=log3 2^3-2log 3 2*3
=3log3 2-2(log3 2+log3 3)
=3a-2(a+1)
=a-2