一大题:已知a^x=2,a^y=3,求(1)a^2x=y;(2)a^x-3y 计算题:(1).y·y^m+1·y^m-1
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一大题:已知a^x=2,a^y=3,求(1)a^2x=y;(2)a^x-3y 计算题:(1).y·y^m+1·y^m-1-y^2m+1(写过程
(2).(3x-y)^2-(3x+y)(3x-y)
(2).(3x-y)^2-(3x+y)(3x-y)
![一大题:已知a^x=2,a^y=3,求(1)a^2x=y;(2)a^x-3y 计算题:(1).y·y^m+1·y^m-1](/uploads/image/z/14966300-20-0.jpg?t=%E4%B8%80%E5%A4%A7%E9%A2%98%EF%BC%9A%E5%B7%B2%E7%9F%A5a%5Ex%3D2%2Ca%5Ey%3D3%2C%E6%B1%82%EF%BC%881%EF%BC%89a%5E2x%3Dy%EF%BC%9B%EF%BC%882%EF%BC%89a%5Ex-3y+%E8%AE%A1%E7%AE%97%E9%A2%98%EF%BC%9A%EF%BC%881%EF%BC%89.y%C2%B7y%5Em%2B1%C2%B7y%5Em-1)
(1)a^2x+y=(a^x)²a^y=2²*3=12
(2)a^x-3y =a^x/(a^y)³=2/3³=2/27
(1)y·y^m+1·y^m-1-y^2m+1=y^m+2+y^m-1-y^2m+1=y^m(y²-1/y-y^m+1)
(2).(3x-y)^2-(3x+y)(3x-y)=(3x-y)(3x-y-3x-y)=-2y(3x-y)
(2)a^x-3y =a^x/(a^y)³=2/3³=2/27
(1)y·y^m+1·y^m-1-y^2m+1=y^m+2+y^m-1-y^2m+1=y^m(y²-1/y-y^m+1)
(2).(3x-y)^2-(3x+y)(3x-y)=(3x-y)(3x-y-3x-y)=-2y(3x-y)
一大题:已知a^x=2,a^y=3,求(1)a^2x=y;(2)a^x-3y 计算题:(1).y·y^m+1·y^m-1
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