问题
解答题
化简计算 (1)(2a-3•b-
(2)log535-2log5
|
答案
(1)原式=[2•(-3)÷4](a-3a-1a4)(b-
b•b2 3
)=-5 3
b23 2
(2)原式=log55+log57-2(log57-log53)+log57-(log59-log55)
=1+log57-2log57+2log53+log57-2log53+1
=2
化简计算 (1)(2a-3•b-
(2)log535-2log5
|
(1)原式=[2•(-3)÷4](a-3a-1a4)(b-
b•b2 3
)=-5 3
b23 2
(2)原式=log55+log57-2(log57-log53)+log57-(log59-log55)
=1+log57-2log57+2log53+log57-2log53+1
=2