问题
解答题
计算: (1)loga2+loga
(2)(2a
(3)
|
答案
(1)原式=loga(2×
)=loga1=0.1 2
(2)原式=[2×(-6)÷3]•a(
+2 3
-1 2
)•b(1 6
+1 2
-1 3
)=4a.5 6
(3)原式=
=a 1 2 a
×a1 2 1 2
=a 1 2 a
=a
a1 2 1 2
.a
计算: (1)loga2+loga
(2)(2a
(3)
|
(1)原式=loga(2×
)=loga1=0.1 2
(2)原式=[2×(-6)÷3]•a(
+2 3
-1 2
)•b(1 6
+1 2
-1 3
)=4a.5 6
(3)原式=
=a 1 2 a
×a1 2 1 2
=a 1 2 a
=a
a1 2 1 2
.a