log5【35】-2log5[7/3】+log5【7】-log5【1.8】 化简
3个回答
原式=log5(35)-log5[(7/3)²]+log5(7)-log5(1.8)
=log5(35÷49/3×7÷1.8)
=log5(5/6)
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化简1/log 7+1/log 7+1/log 7 5 3 2
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计算:log5为底35的对数-2log5为底3分之7的对数+log5为底7的对数-log5为底1.8的对数