七年级数学题!!!急急急急!!!!求助!!
能答几道是几道!!!!x^n乘以^x^n-3x^(n+1)乘以x^(n-1)(x-2y)^2(2y-x)^3-(x-2y)(2y-x)^4(x-y)^4乘以(x-y)-2...
能答几道是几道!!!!
x^n乘以^x^n-3x^(n+1)乘以x^(n-1)
(x-2y)^2(2y-x)^3-(x-2y)(2y-x)^4
(x-y)^4乘以(x-y)-2(y-x)^3乘以(y-x)^2
2x^(2n+5)-x(x)^(n+1)乘以x^(n+3)
2^(n+4)乘以(-2)^3乘以2^n
已知:a^m=2,a^n=3,a=2,求a^(m+n+3) 展开
x^n乘以^x^n-3x^(n+1)乘以x^(n-1)
(x-2y)^2(2y-x)^3-(x-2y)(2y-x)^4
(x-y)^4乘以(x-y)-2(y-x)^3乘以(y-x)^2
2x^(2n+5)-x(x)^(n+1)乘以x^(n+3)
2^(n+4)乘以(-2)^3乘以2^n
已知:a^m=2,a^n=3,a=2,求a^(m+n+3) 展开
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