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श्रेणी के n पदों तक का योगफल ज्ञात करे `(x^(2)+(1)/(x^(2))+2)+(x^(4)+(1)/(x^(4))+5)+(x^(6)+(1)/(x^(6))+8)+..........` |
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Answer» Correct Answer - `(n(3n+1))/(2)+(x^(2n)-1)/(x^(2)-1)[x^(2)+(1)/(x^(2n))]` |
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