题目内容
(1)log3
+lg25+lg4+7log72(2)(
3]2×
)6+(
)
-4(
)-
-
4]2×80.25-(-2005)°.
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解(1)log3
+lg25+lg4+7log72=log
+lg(25•4)+2=log33-
+lg100+2=-
+2+2=
(2)原式=(2
×3
)6+(2
)
-4×[(
)2]-
-2
×2
-1
=22•33+2
•
-4×(
)-1-2-1=108+2-7-3=100
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(2)原式=(2
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=22•33+2
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