问题
解答题
计算 (1)lg20-lg2-log23•log32+2log
(2)(
|
答案
(1)原式=lg
-20 2
•lg3 lg2
+lg2 lg3
=1-1+1 4
=1 4
;1 4
(2)原式=1+(
)2×(-4 3
)+21 2
×(-3 2
)4 3
=1+
+2-23 4
=1+
+3 4 1 4
=2.
计算 (1)lg20-lg2-log23•log32+2log
(2)(
|
(1)原式=lg
-20 2
•lg3 lg2
+lg2 lg3
=1-1+1 4
=1 4
;1 4
(2)原式=1+(
)2×(-4 3
)+21 2
×(-3 2
)4 3
=1+
+2-23 4
=1+
+3 4 1 4
=2.