If ( -1 (x 2 ) )= ( -1 1-x2 ), x (0, 1), then the value of x is :
- 12
- 13
- 23
- 58
Answer
(1) 12
Solution
Let -1 (x 2 )= , (0, 2 ) =x 2
= x 2 1+2x2
Let -1 1-x2= , (0, 2 ) = 1-x2, =x
= x 1-x2
x 2 1+2x2= x 1-x2
2 (1-x2 )=1+2x2 ( x 0)
x2= 14 x= 12 ( x (0, 1))
Answer: (1)