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If 9th term of an a.p. …

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If 9th term of an a.p. is zero then proof that 29th term is double the 19th term

    • Posted by Aditya Patwa 4 years, 1 month ago

    CBSE > Class 11 > Mathematics
    • 2 answers

    Subham Gupta 4 years, 1 month ago

    Too.long process.. you have done

    1Thank You

    Abhishek Sharma 4 years, 1 month ago

    Let a and b respectively be the first term and common difference of the AP Given A9=0 So ,a+(9-1)d=0 a+8d=0 a=-8d Now ,29 th term= a+28d =-8d+28d =20d=2*10d =2(-8d+18d) =2(a+18d) =2*19th term Thus ,the 29 th term of the AP is double the 19th term

    4Thank You

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