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The sum of n terms of …

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The sum of n terms of an AP is (5n²—3n).find the Ap and hence its 10th trem

    • Posted by Ansh Shekhawat 6 years, 3 months ago

    CBSE > Class 10 > Mathematics
    • 1 answers

    Ramesh Reddy K 6 years, 3 months ago

    S1=5(1)^2-3(1)=2=a1=a S2=5(2)^2-3(2)=14=a1+a2 a2=14-2=12 d=12-2=10 A.P is 2, 12, 22....... a10=2+9(10)=92

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