问题
解答题
计算下列各题 (1)52log53+log432-log3(log28); (2)(0.027)-
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答案
(1)52log53+log432-log3(log28)
=5log532+log2225-log3(log223)
=9+
-1=5 2 21 2
(2)(0.027)-
-(1 3
)-2+(21 7
)7 9
-(1 2
-1)02
=[(0.3) 3]-
-(7)2+(1 3
)25 9
-11 2
=
-49+10 3
-15 3
=-45.