若a-3+b B a-b>0 C 1^3a>1^3b D -2a>-2b
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
a,b,c,d>0 证(a/(b+2c+3d))+(b/(c+2d+3a))+(c/d+2a+3b))+(d/(a+2b
求行列式D=a b b b的第四行元素的代数余子式之和 b a b b b b a b 1 2 3 4
(a-b)(b-c)(c-a)/(b-a)(a-c)2(c-b)3
a-b\a+b=1\2时,求代数式a+b\3(a-b) - a-b\2(a+b)
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)]
如果2a+b=0,则|a/|b|-1|+||a|/b-2|等于().A,2B,3C,4D,
若a-b=-3,c+d=2,则(b+c)-(a-d)的值( ) a.-1 b.-5 c.5 d.1
若a-b=-3,c-d=2,则(b+c)-(a-d)的值( ) a.-1 b.-5 c.5 d.1
A B C D × 9 ___________________ D C B A (1) A = ( )(2) B = (
化简 (a+b)²+2a(a-1/2b)-3(a-b)(a+b)
a=2,b=-3,c=-1,计算:|a-b|+|b-c-a|.