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10的m次方=5 10的2m次方=5×5=25 10的n次方=3 10的3n次方=3的3次方=27 10的2m+3n次方 =10的2m次方×10的3n次方 =25×27 =675
3的2m次方=9 2m=2 ,2的3n次方等於64,3n=6 m+n=1+2=3 5的m+n次方=5*5*5=125
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