若3x^(m+5)y^2与x^3y^n是单项式,则m^n=_____
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若3x^(m+5)y^2与x^3y^n是单项式,则m^n=_____若3x^(m+5)y^2与x^3y^n是单项式,则m^n=_____若3x^(m+5)y^2与x^3y^n是单项式,则m^n=___
若3x^(m+5)y^2与x^3y^n是单项式,则m^n=_____
若3x^(m+5)y^2与x^3y^n是单项式,则m^n=_____
若3x^(m+5)y^2与x^3y^n是单项式,则m^n=_____
依题意,x和y的指数分别相等,
可得:m+5 = 3 ,n = 2 ,
则有:m = -2 ,n = 2 ,
所以,m^n = (-2)^2 = 4 .
依题意得
(1)M+5=3,(2)N=2
解(1)(2)组成的方程组得,M=-2,N=2
则m^n=(-2)^2=4
由题意得:
X^(M+5)=X^3 y^2=y^n
那么m+5=3 m=-2 n=2
所以m^n=-2^2=4
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