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If the 9th term of an …

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If the 9th term of an AP is 0,prove that its 29th term is twice its 19th term

    • Posted by Piyush Patel 7 years, 3 months ago

    CBSE > Class 10 > Mathematics
    • 1 answers

    Asif Ansari 7 years, 3 months ago

    Case1:a9=0 a+8d=0 a=-8d Case2:a29=a+28d =(-8d)+28d =20d And a19=a+18d =(-8d)+18d =10d Then,A29 /a19=20d/10d =2 Hence,a29 is twice of a19.

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