问题
填空题
计算:(log43+log83)(log32+log94)=______.
答案
:(log43+log83)(log32+log94)
=(
+lg3 lg4
)(lg3 lg8
+lg2 lg3
)=(lg4 lg9
+lg3 2lg2
)(lg3 3lg2
+lg2 lg3
)=2lg2 2lg3
•5lg3 6lg2
=2lg2 lg3
.5 3
故答案为
.5 3