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23 July, 03:04

How many term are there in A. P 201,208,215 ... 369

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  1. 23 July, 06:57
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    Last term = 369

    First tern (a) = 201

    common difference = 208 - 201 = 7

    Last term = a + (n - 1) d

    369 = 201 + (n - 1) x 7 = 201 + 7n - 7 = 194 + 7n

    7n = 369 - 194 = 175

    n = 175/7 = 25

    The A. P. has 25 terms
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