(1)化简: ( a - 1 + 1 a - 3 ) ÷ a 2 - 4 a - 3 ;
(2)解不等式: x + 1 3 - 1 < x - 1 4 .
化简 x x 2 + 2 x + 1 ÷ 1 - 1 x + 1 的结果是( )
A. 1 x + 1 B. x + 1 x C. x + 1 D. x ﹣ 1
计算: ( 2 a + 1 + a + 2 a 2 - 1 ) ÷ a a - 1 .
化简: a 2 - 1 a 2 ÷ 1 a - 1 = .
计算:
(1);
(2).
化简: a a - 2 - 4 a 2 - 2 a ÷ a + 2 a .
化简: ( x x - 3 + 2 3 - x ) ⋅ x - 3 x - 2 = .
计算 x 2 + 4 x + 4 x + 2 ÷ x 2 + 2 x x - 2 - 1 .
化简 ( a - b 2 a ) ÷ a - b a 的结果是 ( )
a - b
a + b
1 a - b
1 a + b
(1)计算:
(2)化简:
化简:.
化简: ( a 2 a - 1 - a - 1 ) ÷ 2 a a 2 - 1 .
(1) ( x + y ) 2 + y ( 3 x ﹣ y ) ;
(2) ( 4 - a 2 a - 1 + a ) ÷ a 2 - 16 a - 1 ;
化简: 1 a - 1 - 1 a 2 + a ÷ a 2 - 1 a 2 + 2 a + 1
化简: ( a 2 a − 3 + 9 3 − a ) ÷ a + 3 a = .