帮我解几道数学题,
问题描述:
帮我解几道数学题,
1)(y-x)^3×(x-y)^2×(y-x)
(2)4×2^n×2^n-1
(3)X^3×X^2n-1+X^2n×(-x)^2
(4)(y^2×y^3)÷(y×y^4)
答
(1)=(y-x)^3×(y-x)^2×(y-x)=(y-x)^6
(2)=2^2x2^nx2^(n-1)=2^(2+n+n-1)=2^(2n+1)
(3)=X^3×X^(2n-1)+X^2n×x^2=X^(3+2n-1+2n+2)=x^(4n+4)
(4)=y^(2+3)÷y^(1+4)=y^5÷y^5=1