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Let Tr be the rth term of an A.P., for ...

Let `T_r` be the rth term of an A.P., for `r=1,2,3,.....` If for some positive integers `m ,n ,` we have `T_m=1/na n dT_n=1/m ,t h e nT_(m n)` equals a.`1/(m n)` b. `1/m+1/n` c. `1` d. `0`

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