试题:
计算(log43+log83)(log32+log92)的值.

答案:

我来补答
(log43+log83)(log32+log92)
=(
lg3
lg4
+
lg3
lg8
)(
lg2
lg3
+
lg2
lg9
)

=(
lg3
2lg2
+
lg3
3lg2
)(
lg2
lg3
+
lg2
2lg3
)

=
1
2
+
1
4
+
1
3
+
1
6
=
5
4
 
 
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剩余:2000
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