问题
解答题
求下列函数的值: (1)(
(2)lg
|
答案
(1)(
)9 25
×(1 2
)-1+4×(1 10
)- 8 27 2 3
=
×10+4×(3 5
)-22 3
=6+4×9 4
=15.
(2)lg
-4 2 7
lg24 3
+lg73 2 5
=lg(
÷24 2 7
×3 2
×74 3
)5
=lg10
=
.1 2
求下列函数的值: (1)(
(2)lg
|
(1)(
)9 25
×(1 2
)-1+4×(1 10
)- 8 27 2 3
=
×10+4×(3 5
)-22 3
=6+4×9 4
=15.
(2)lg
-4 2 7
lg24 3
+lg73 2 5
=lg(
÷24 2 7
×3 2
×74 3
)5
=lg10
=
.1 2