1.已知,3x(x^n+5)=3x^n+1+45,求x的值.2.若1+2+3+…+n=a,求代数式(x^n*y)(x^n-1*y²)(x^n-2*y³)...(x²y^n-1)(xy^n)的值.3.已知2x+5y-3=0,求4^x*32^y的值.4.已知25^m*2*10^n=5^7*2^4,求m、n.5.已知a^x=5,a^(x+
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![1.已知,3x(x^n+5)=3x^n+1+45,求x的值.2.若1+2+3+…+n=a,求代数式(x^n*y)(x^n-1*y²)(x^n-2*y³)...(x²y^n-1)(xy^n)的值.3.已知2x+5y-3=0,求4^x*32^y的值.4.已知25^m*2*10^n=5^7*2^4,求m、n.5.已知a^x=5,a^(x+](/uploads/image/z/683904-48-4.jpg?t=1.%E5%B7%B2%E7%9F%A5%2C3x%28x%5En%2B5%29%3D3x%5En%2B1%2B45%2C%E6%B1%82x%E7%9A%84%E5%80%BC%EF%BC%8E2.%E8%8B%A51%EF%BC%8B2%EF%BC%8B3%EF%BC%8B%E2%80%A6%EF%BC%8Bn%EF%BC%9Da%2C%E6%B1%82%E4%BB%A3%E6%95%B0%E5%BC%8F%28x%5En%2Ay%29%28x%5En-1%2Ay%26sup2%3B%29%28x%5En-2%2Ay%26sup3%3B%29...%28x%26sup2%3By%5En-1%29%28xy%5En%29%E7%9A%84%E5%80%BC.3.%E5%B7%B2%E7%9F%A52x%EF%BC%8B5y%EF%BC%8D3%EF%BC%9D0%2C%E6%B1%824%5Ex%2A32%5Ey%E7%9A%84%E5%80%BC.4.%E5%B7%B2%E7%9F%A525%5Em%2A2%2A10%5En%3D5%5E7%2A2%5E4%2C%E6%B1%82m%E3%80%81n%EF%BC%8E5.%E5%B7%B2%E7%9F%A5a%5Ex%3D5%2Ca%5E%28x%2B)
1.已知,3x(x^n+5)=3x^n+1+45,求x的值.2.若1+2+3+…+n=a,求代数式(x^n*y)(x^n-1*y²)(x^n-2*y³)...(x²y^n-1)(xy^n)的值.3.已知2x+5y-3=0,求4^x*32^y的值.4.已知25^m*2*10^n=5^7*2^4,求m、n.5.已知a^x=5,a^(x+
1.已知,3x(x^n+5)=3x^n+1+45,求x的值.
2.若1+2+3+…+n=a,求代数式(x^n*y)(x^n-1*y²)(x^n-2*y³)...(x²y^n-1)(xy^n)的值.
3.已知2x+5y-3=0,求4^x*32^y的值.
4.已知25^m*2*10^n=5^7*2^4,求m、n.
5.已知a^x=5,a^(x+y)=25,求a^x+a^y的值.
1.已知,3x(x^n+5)=3x^n+1+45,求x的值.2.若1+2+3+…+n=a,求代数式(x^n*y)(x^n-1*y²)(x^n-2*y³)...(x²y^n-1)(xy^n)的值.3.已知2x+5y-3=0,求4^x*32^y的值.4.已知25^m*2*10^n=5^7*2^4,求m、n.5.已知a^x=5,a^(x+
(1)(3x^n+1)+15x=(3x^n+1)+45
15x=45
x=3
(3)2x+5y=3
4^xX32^y=2^2xX2^5y=2^2x+5y=2^3=8
(4)25^mX2X10^n=5^2nX2X2^nX5^n=5^2m+nX2^n+1
2m+n=7
n+1=4
n=3
m=2
(5)a^(x+y)=a^xXa^y=5Xa^y
a^y=5
a^x+a^y=5+5=10
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