计算:(1);(2).
计算
(1)计算:2 ﹣ 2+(3 27 ﹣ 1 4 6 )÷ 6 ﹣3sin45°;
(2)解方程: x - 3 x - 2 +1= 3 2 - x .
(1)化简求值: 2 x x + 1 + 4 - 2 x x 2 - 1 ÷ x - 2 x 2 - 2 x + 1 ,其中 x=﹣2 2+2sin45°+|﹣3|;
(2)解不等式组: x - 3 ( x - 2 ) ≤ 8 ① 2 x - 1 5 > x + 1 2 - 1 ② ,并求其非负整数解.
先化简,再求值: x 2 x + 1 - x + 1 ,其中 x= 12 ﹣( 1 4 ) ﹣ 1﹣|1﹣ 3 |.
(1)计算: ( - 1 ) 2018 - 2 cos 30 ∘ - 1 2 - 2 - | 3 - 2 | + ( 2018 - π ) 0
(2)先化简,再求值: x 2 - 2 x + 1 x 2 - x - 4 - x 2 x 2 + 2 x ÷ x - 4 x ,且 x为满足﹣3< x<2的整数.
(1)计算: | - 2 | - 2016 0 + 1 2 - 2
(2)解不等式组: 2 3 x > 5 - x x + 2 > 2 x - 3 .