ESE 2021Q58
Q: If (x + 1)/(x − 1) = a/b and (1 − y)/(1 + y) = b/a, then the value of (x − y)/(1 + xy) is
(a)2ab / (a² − b²)
(b)(a² − b²) / 2ab
(c)(a² + b²) / 2ab
(d)(a² − b²) / ab
Correct Answer: (b)
Detailed explanation coming soon.
Loading...
ESE 2021Q. 58 of 100