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数学
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若4M的2次方-6N+4M+10=0,求M的负N次方
人气:265 ℃ 时间:2019-09-23 09:40:23
解答
是不是少一个n²
4m²+4m+1+n²-6n+9=0
(2m+1)²+(n-3)²=0
∴2m+1=0
n-3=0
∴m=-1/2 n=3
∴m^(-n)=(-1/2)^(-3)=-8
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