2^(3m-2n-1)
=2^(3m)÷2^(2n)÷2
=(2³)^m÷(2²)^n÷2
=8^m÷4^n÷2
=12÷6÷2
=1
(注:a^b表示a的b次方)
已知8的m次方=12,4的n次方=6求2的3m-2n-1次方的值
已知8的m次方=12,4的n次方=6求2的3m-2n-1次方的值
数学人气:974 ℃时间:2019-10-08 18:14:39
优质解答
我来回答
类似推荐
猜你喜欢
- 1表示喜欢的词语有哪些
- 2是have a good night sleep还是have a good night's sleep
- 3She and( )mother( )the same.括号里应填什么?
- 4I hope to fly to the moon some day.(根据情景回答) ____ ____,____.I really want to be an astronaut.
- 5she looks very happy because her son ( ) her. A.satisfy B.satisfying C.satisfise D. satisfied
- 6地球不是七分海洋,三分陆地吗?怎么不把地球称为“水球”?
- 78.You won't catch me ____ (do) that again!
- 8计算(1+3+5+7…+2013)-(2+4+6…+2012)=_.
- 9(80加8加0、8)乘1、25怎么简便计算
- 10____Doing____(do)exercise can help you get stronger 为什么是doing(⊙o⊙)?