已知2的m次方等于5,2的n次方等于3,求(1)8的m次方(2)求2的m+2a次方的值

2024-12-21 06:46:06
推荐回答(3个)
回答1:

问题一:8^m=(2^3)^m=(2^m)^3=5^3=125

问题二:如果求的是求2的m+2n次方的值

2^(m+2n)=2^m×2^(2n)=2^m×(2^n)^2=5×3^2=45

回答2:

(1)8的m次方
=(2³)的m次方
=(2的m次方)³
=5³
=125

(2)求2的m+2n次方的值
=2的m次方×(2的n次方)²
=5×3²
=45

回答3:

8^m
=(2^3)^m
=(2^m)^3
=5^3
=125

2^(m+2n)
=2^m*2^2n
=2^m*(2^n)^2
=5*3^2
=5*9
=45