问题
解答题
计算题: (1)
(2)log525; (3)2
(4)lg
|
答案
(1)原式=|-a|=a (a>0);
(2)原式=log552=2;
(3)原式=2×3
×(1 2
)3 2
×(3×22)1 3
=21-1 6
+1 3
×31 3
+1 2
+1 3
=2×3=6;1 6
(4)原式=lg
=lg10-2=-2.1 4 25
计算题: (1)
(2)log525; (3)2
(4)lg
|
(1)原式=|-a|=a (a>0);
(2)原式=log552=2;
(3)原式=2×3
×(1 2
)3 2
×(3×22)1 3
=21-1 6
+1 3
×31 3
+1 2
+1 3
=2×3=6;1 6
(4)原式=lg
=lg10-2=-2.1 4 25