作业帮1.x(x-y)^2(a-b)-(y-x)^3(b-a) 2.(-2）^2001+2^2002
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1.x(x-y)^2(a-b)-(y-x)^3(b-a) 2.(-2）^2001+2^2002
1.x(x-y)^2(a-b)-(y-x)^3(b-a) 2.(-2）^2001+2^2002
1.x(x-y)^2(a-b)-(y-x)^3(b-a) 2.(-2）^2001+2^2002
1.x(x-y)² (a-b)-(y-x)³(b-a)
＝x(x-y)² (a-b)-(x-y)³(a-b)
=(x-y)² (a-b)(x-x+y)
=y(x-y)² (a-b)
2.(-2）^2001+2^2002
=-2^2001+2*2^2001
=2^2001
x(x-y)^2(a-b)-(y-x)^3(b-a)
=x(x-y)^2(a-b)-(x-y)^3(a-b)
=(x-y)^2(a-b)［x-(x-y)］
=y(x-y)^2(a-b)
.(-2）^2001+2^2002
=.-2^2001+2*2^2001
=(-1+2)*2^2001
=2^2001
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