化简:1÷(3b/3a÷4b/9a×3a/2b)
化简:1÷(3b/3a÷4b/9a×3a/2b)
已知2a-b+1的绝对值+(3a+3/2b)^=0,求(b^/a+b)÷{[(b/a-b)+1][a-(a^/a+b)]
计算:(b/a)^2÷(a/b)-b^3/a^3(a-b) ÷ 1/a-b
化简 (a+b)²+2a(a-1/2b)-3(a-b)(a+b)
[(a+2b)(a-2b)-(2a-b)²+(3a-b)(3a-5b)]÷2a
计算a^-2b^-3*(-3a^-1b^2)÷6a^-4b^-2
A=B+B+B+B+B+B+B+B+B+B+B+B+B+B+B A-B×3=C C+2×7+2=1
[(2b-a)(3a+2b)-(a+2b)²]÷(-1/2a)
1,已知3a-b=6,求[(4a平方+b平方)-(2a-b)平方+2b(a-b)]÷b,
1.(a-b)^2(b-a)^3(a-b)^-4
计算:(-2a^2b)^2-(3a^3b^2)÷5a^2b^2+7a^9b^6÷2a^5b^4
化简:{[(2a-b)/(a+b)]-[b/(a-b)]}÷[(a-2b)/(a+b)]