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If the 3rd and 9th term …

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If the 3rd and 9th term of an Ap is 4 and -8 respectively which term of this Ap is zero

    • Posted by Chetna Saini 6 years, 11 months ago

    CBSE > Class 10 > Mathematics
    • 2 answers

    Chetna Saini 6 years, 10 months ago

    Please reply me

    0Thank You

    Gaurav Seth 6 years, 11 months ago

    a+2d = 4 …(1)

    a+8d = -8 …(2)

    Deduct (1) from (2), to get

    6d = -12, or d = -2.

    From (1), a = 4–2d = 4+4 = 8.

    So the numbers of the AP are- 8, 6, 4, 2, 0, -2, -4, -6, -8.

    So the 5th term is zero.

    3Thank You

    ANSWER
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