3 log akar 5 x 4 log 1/3 x 5 log 7 x 25 log 49………

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3 log akar 5 x 4 log 1/3 x 5 log 7 x 25 log 49………

1/2.3log5 x (-1/2) 2log3 x 5log7 x 2/2 5log7 = -1/4 x 2log3.3log5.5log7.5log7
= -1/4 2log7.5log7