Question

已知2的2m+1次方+4的m次方=48,求6-m的3次方的值

Answer 1

2^(2m+1)+4^m=48

2^(2m+1)+2^(2m)=16+32=2^4+2^5

2m=4

m=2

(6-m)^3=(6-2)^3=64

6-m^3=6-2^3=6-8=-2

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