{ab-[3a^2b-(4a^2b+1/2ab)]-4a^2b}+3a^2b}=
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{ab-[3a^2b-(4a^2b+1/2ab)]-4a^2b}+3a^2b}=
{ab-[3a^2b-(4a^2b+1/2ab)]-4a^2b}+3a^2b}=
{ab-[3a^2b-(4a^2b+1/2ab)]-4a^2b}+3a^2b}=
{ab-[3a^2b-(4a^2b+1/2ab)]-4a^2b}+3a^2b
=ab-3a²b+4a²b+ab/2+4a²b+3a²b
=3ab/2+8a²b
{ab-[3a^2b-(4a^2b+1/2ab)]-4a^2b}+3a^2b
=ab-3a²b+4a²b+ab/2-4a²b+3a²b
=ab+ab/2-3a²b+4a²b-4a²b+3a²b
=3ab/2
1/4a^2b^2{3ab(a+b)-5a(ab-b^2)}=?
{ab-[3a²b-(4a²b+1/2ab)]-4a²b}+3a²b
计算(a/a-b+b/b-a)/(1/a+b)的结果 (1)a-b (2)ab (3)a^2-b^2 (4)a+b
ab^3+b^2+b-a+1
(a-b)^3+2ab(a-b)
1.(a-b)(a^2+ab+b^3)2.(a-b)(a^3+a^2b+ab^2+b^3)3.(a-b)(a^4+a^3b+a^2b^2+ab^3+b^4)4.(a-b)(a^10+a^9b+a^8b^2+...+ab^9+b^10)5.(X-1)(x^5+x^4+x^3+x^2+1)6.(a-b)(a^n+a^n-1b+a^n-2b^2+...+ab^n-1+b^n)
-3/4ab+2/3a^2b+ab-a^2b-1/2ab-5/3a^2b
等式:(a+b)^0=1 (a+b)^1=a+b (a+b)^2(a+b)^0=1(a+b)^1=a+b(a+b)^2=a^2+2ab+b^2(a+b)^3=a^3+3a^2b+3ab^2+b^3问:(a+b)^4=?(a+b)^5=?``````` (a+b)^9=?
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