解分式方程: 2 x - 1 x + 3 = 1 .
解方程: x - 3 2 + x - 1 3 = 4 .
解方程: x − 1 x + 1 − 3 x 2 − 1 = 1 .
解方程 2 x + 1 + 1 = x x - 1 .
解方程: x + 1 x - 1 - 4 x 2 - 1 = 1 .
解方程: x 2 x - 3 + 5 3 x - 2 = 4 .
解分式方程: 1 x = 2 x + 3 .
(1)计算: 8 + ( π + 2 ) 0 + ( - 1 ) 2021 - 2 cos 45 ° ;
(2)解分式方程: x - 3 x - 2 + 1 = 3 2 - x .
解分式方程: x - 2 x - 3 x - 2 = 1 .
解方程: x - x - 2 2 = 1 + 2 x - 1 3 .
设a,b是任意两个实数,规定a与b之间的一种运算“⊕”为: a ⊕ b b a ( a > 0 ) a - b ( a ≤ 0 ) ,
例如: 1 ⊕ ( - 3 ) = - 3 1 = - 3 , ( - 3 ) ⊕ 2 = ( - 3 ) - 2 = - 5 ,
x 2 + 1 ⊕ ( x - 1 ) = x - 1 x 2 + 1 (因为 x 2 + 1 > 0 )
参照上面材料,解答下列问题:
(1) 2 ⊕ 4 = , (﹣ 2 ) ⊕ 4 = ;
(2)若 x > 1 2 ,且满足 ( 2 x - 1 ) ⊕ ( 4 x 2 - 1 )=(﹣ 4 ) ⊕ ( 1 - 4 x ) ,求x的值.
解方程: 3 x + 1 = x x - 1 - 1 .
解分式方程: 3 x = 4 1 + x .
(1)计算: 1 2 - 1 - 27 - ( π - 2016 ) 0 + 9 tan 30 ∘ ;
(2)解分式方程: x - 3 x - 2 + 1 = 3 x - 2 .
解方程: 2 x - 2 = 3 x .