exam Maths Puzzle Numerical Ability

R(x) = x + 1 / x - 1, if T(x) = R(x), then T(x) =
a. T(x) = 2x/x+1
b. T(x) = x+2/x+1
c. T(x) - x+2/x-1
d. T(x) = 2x/x-1

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