问题
解答题
化简 (1)
(2)
|
答案
(1)
lg25+lg2-lg1 2
-log29×log320.1
=lg5+lg2+
-21 2
=-
.1 2
(2)5 6
•b-2(3 a
•b)-1÷(4-1aa
b-3)2 3
×1 2 ab
=
×4×a5 6
-1 3
-1 2
+1 3
×b-2-1+1 2
+3 2 1 2
=
.10 3b
化简 (1)
(2)
|
(1)
lg25+lg2-lg1 2
-log29×log320.1
=lg5+lg2+
-21 2
=-
.1 2
(2)5 6
•b-2(3 a
•b)-1÷(4-1aa
b-3)2 3
×1 2 ab
=
×4×a5 6
-1 3
-1 2
+1 3
×b-2-1+1 2
+3 2 1 2
=
.10 3b