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Deepak Bora
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If this question form an A.P. find the common difference and write three more terms. -1.2, -3.2, -5.2, -7.2

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The following question is of NCERT Book class 10th Chapter no.5 Q. 3(iii). In this question you have to find whether this question is an A.P or not if yes then find the common difference and write three more terms of the given series. Solve the following question.

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  1. Given, -1.2, – 3.2, -5.2, -7.2 …

    Here, a= Initial value , d= Common Difference

    a2 – a1 = (-3.2) – (-1.2) = -2

    a3 – a2 = (-5.2) – (-3.2) = -2

    a4 – a3 = (-7.2) – (-5.2) = -2

    Here common difference is equal.

    d = -2 and the given series are in A.P.

    The next three terms are-

    a5 = – 7.2-2 = -9.2

    a6 = – 9.2-2 = – 11.2

    a7 = – 11.2-2 = – 13.2

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