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If the sum of the third …

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If the sum of the third and the eighth term of an AP is 7 and the sum of the seventh and fourteenth term is -3 find the tenth term

    • Posted by Meera Savatha 4 years, 4 months ago

    CBSE > Class 10 > Mathematics
    • 2 answers

    Deep Singh 4 years, 4 months ago

    a+2d+a+7d=7 =>2a+9d=7--------[1] a+6d+a+13d= -3 =>2a+19d= -3 ---------[2] On subtracting 1 and 2, -10d =10 ,therefore d=-1 Now putting the value of d in eq. 1,we get, a=8. Therefore,10th term= a+9d = 8+9(-1) =-1 Since, 10th term = -1.

    0Thank You

    Sushant Singh 4 years, 4 months ago

    a10= -1.

    1Thank You

    ANSWER
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