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116问答网 > 已知a的m次方=3,a的n次方=5,求a的m-n次方的值,a的2m-2n次方的值

已知a的m次方=3,a的n次方=5,求a的m-n次方的值,a的2m-2n次方的值

2025-03-30 18:55:11

推荐回答（5个）

回答1：

解：
a^(m-n)
=a^m÷a^n
=3÷5
=3/5

a^(2m-2n)
=[a^(m-n)]²
=(3/5)²
=9/25

回答2：

a的（m-n次方
=a的m次方/a的n次方
=3/5
a的（2m-2n）
=a的2m次方/a的2n次方
=3^2/5^2
=9/25

回答3：

a的m次方=3，a的n次方=5
a的m-n次方=a的m次方/a的n次方=a的m-n次方=3/5
a的2m-2n次方=（a的m次方*a的m次方）/（a的n次方*a的n次方）=3*3/5*5=9/25

回答4：

a的m-n次方等于-2，ad 2m-2n等于-4.

回答5：

Am=3，An=5
Am-n=Am/An=3/5=0.6
A2m-2n=(Am-n)2=0.36

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