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= 1/2 * 2+2 .2 log 8
=1/2 * 4 *2log 4x2
= 1/2 *4*2log4 + 2 log 2
= 1/2*4 +2log2+2log2+2log2
=1/2.4 + 1+1+1
=5 atw 7/2
c. 3log81= 3log 9^2
= 2. 3log 9
=2.3log 3^2
=2.2 + 3log3
=4+1
=5