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14 November, 19:59

If a+1,2a+1,4a-1 are in A. P, then the value of a is

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  1. 14 November, 20:04
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    Step-by-step explanation:

    ∵a+1,2a+1,4a-1 are in A. P.

    2 (2a+1) = a+1+4a-1

    4a+2=5a

    5a-4a=2

    a=2
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