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Find the middle term of an …

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Find the middle term of an A. P 20,16,12...,-180

    • Posted by Aaliya Yduvanshi.... 6 years, 2 months ago

    CBSE > Class 10 > Mathematics
    • 1 answers

    Aadya Singh ? 6 years, 2 months ago

    Tn = a+(n-1)d => -180 = 20 + (n-1) -4 => -200 = -4n + 4 => -204 = -4n => n = 51 . Since, there are 51 terms. So, the middle term = 26 th term.

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