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If sum of first n terms of an AP (having...

If sum of first n terms of an AP (having positive terms) is given by `S_n=(1+2T_n)(1-T_n)` , where `T_n` is the nth term of series , and `T_2^2=(sqrta-sqrtb)/4 (a,b in N)` . Then (a+b) is ____

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Knowledge Check

  • The sum of first n terms of an AP is (5n - n^(2)). The nth term of the AP is

    A
    (5-2n)
    B
    (6-2n)
    C
    (2n -5)
    D
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