∵[-3x的m+1次方乘y²]³÷[-2x³乘y的n+1次方]²=-4分之81 x³,有
[-27x^(3m+3)y^6]÷[4x^6y^(2n+2)]==-4分之81 x³
(-27/4)x^(3m-3)y^(4-2n)=-81x²/4
x^(3m-6)y^(4-2n)=3
因为题目有问题,只能做到这里.
如果右边的81换成27的话;有:
x^(3m-6)y^(4-2n)=1→3m-6=0且4-2n=0可得:m=2,n=2
已知[-3x的m+1次方乘y²]³÷[-2x³乘y的n+1次方]²=-4分之81 x³
已知[-3x的m+1次方乘y²]³÷[-2x³乘y的n+1次方]²=-4分之81 x³
数学人气:169 ℃时间:2019-12-06 02:16:13
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