化简:b/(a-b)+b^2/(a^3-2a^2b+ab^3)*(ab+b^2)/(b^2-a^2)
问题描述:
化简:b/(a-b)+b^2/(a^3-2a^2b+ab^3)*(ab+b^2)/(b^2-a^2)
答
b/(a-b)+b^2/(a^3-2a^2b+ab^3)*(ab+b^2)/(b^2-a^2)=b/(a-b)-[b^2/a(a^2-2ab+b^2)]*b(a+b)]/(a^2-b^2)=b/(a-b)-[b^2/a(a-b)^2]*(a+b)(a-b)/b(a+b)=b/(a-b)-b/a(a-b)=(ab-b)/a(a-b)=b(a-1)/a(a-b)b/(a-b)+b^3/(a^3-2a^2b+ab^3)/(ab+b^2)/(b^2-a^2)