问题
解答题
计算:(1)(-3
(2)log2.56.25+lg0.01+ln
|
答案
解(1)原式=(
)-27 8
+(10-2)-2 3
-1 2
+11
-12
=
+10-(9 4
+1)+1(4分)2
=
+10-9 4
(6分)2
=
-49 4
(7分)2
(2)原式=log2.52.52+lg10-2+lne
+2×2 log231 2
=2-2+
+2×3 (5分)1 2
=
(7分)13 2