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Let T(r) be the r^(th) term of an A.P. w...

Let `T_(r)` be the `r^(th)` term of an A.P. whose first term is a and common difference is d. If for some positive integers m and `n , m ne n T_(m) = (1)/(n) ` and `T_(n) = (1)/(m)` then a -d equals

A

0

B

1

C

`(1)/(mn)`

D

`(1)/(m) + (1)/(n)`

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The correct Answer is:
A
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