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计算:
(1) | - 6 | + ( - 2 ) 3 + ( 7 ) 0 ;
(2) ( a + b ) ( a - b ) - a ( a - b )
(1) | - 2 3 | - 12 + ( 1 3 ) - 2 ;
(2) ( x - 2 ) 2 - ( x + 2 ) ( x - 2 ) .
(1)计算: ( 7 - 1 ) 0 - ( - 1 2 ) - 2 + 3 tan 30 ° ;
(2)解方程: x + 1 x - 1 + 4 1 - x 2 = 1 .
计算: | - 3 | + ( - 1 ) 4 - 2 tan 45 ° - ( π - 1 ) 0 .
计算: | - 1 | + 4 - ( π - 3 ) 0 .
(1)计算: | - 4 | - ( - 2 ) 2 + 9 - ( 1 2 ) 0
(2)解不等式组 3 x - x ⩾ 2 1 + 2 x 3 > x - 1 .
计算: - ( - 1 ) - 8 3 + ( π - 3 . 14 ) 0 .
(1) | - 3 | - ( 5 + 1 ) 0 + ( - 2 ) 2 ;
(2) ( 1 - 3 a ) ÷ a - 3 a 2 .
(1)计算: tan 45 ° - ( 2 - 1 ) 0 + | - 5 |
(2)化简: 2 a - 1 a - 1 - a 2 - a ( a - 1 ) 2 .
(1)计算: ( - 1 3 ) - 2 - 12 + 6 cos 30 ° ;
(2)先化简,再求值: ( a + b ) ( a - b ) - ( a - 2 b ) 2 ,其中 a = 2 , b = - 1 .
(1) | - 2 | - ( 1 3 ) - 1
(2) ( 3 - 7 ) ( 3 + 7 ) + 2 ( 2 - 2 )
(1) ( - 1 ) 2016 + π 0 - ( 1 3 ) - 1 + 8 3
(2) x 2 - 1 x + 1 ÷ x 2 - 2 x + 1 x 2 - x .
(1) | - 5 | - ( - 3 ) 2 - ( 7 ) 0
(2) ( a - b ) 2 - a ( a - 2 b )
计算: 2 sin 30 ° + 3 - 1 + ( 2 - 1 ) 0 - 4 .
试题篮