问题
解答题
计算: (1)27
(2)log2
|
答案
(1)式子=33×
+42×(-2 3
)-2(-1)×(-2)-(1 2
)3×(-2 3
)+lg10-2-22 3
=9+
-4-1 4
-2-2=-1.9 4
(2)式子=
×log 5-22
×log 2-33
=-12log 3-25
×log 52
×log 23
=-12.log 35
计算: (1)27
(2)log2
|
(1)式子=33×
+42×(-2 3
)-2(-1)×(-2)-(1 2
)3×(-2 3
)+lg10-2-22 3
=9+
-4-1 4
-2-2=-1.9 4
(2)式子=
×log 5-22
×log 2-33
=-12log 3-25
×log 52
×log 23
=-12.log 35