问题
解答题
求值:(1)(
(2)2log525-3log264. |
答案
(1)(
-3 25
)÷125 4 25
=(5
-52 3
)÷53 2 1 2
=5
-2 3
-51 2
-3 2 1 2
=5
-51 6
=
-5.6 5
(2)2log525-3log264
=2log552-3log226
=4-3×6
=-14.
求值:(1)(
(2)2log525-3log264. |
(1)(
-3 25
)÷125 4 25
=(5
-52 3
)÷53 2 1 2
=5
-2 3
-51 2
-3 2 1 2
=5
-51 6
=
-5.6 5
(2)2log525-3log264
=2log552-3log226
=4-3×6
=-14.