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Series of powers of x with a logarithm as the sum

This type of question, asked 2 times: 2021 Paper 20, 2021 Paper 21. All 2 questions below, oldest first.

Try each one first, then open its answer.

  1. Question 1

    2021 Paper 20

    61
    If 0<x<10 <x< 1, then 32x2+53x3+74x4+….\frac{3}{2}x^{2}+\frac{5}{3}x^{3}+\frac{7}{4}x^{4}+ \ldots.. , is equal to :

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  2. Question 2

    2021 Paper 21

    78
    If 0<x<10 <x< 1 and y=12x2+23x3+34x4+…y=\frac{1}{2}x^{2}+\frac{2}{3}x^{3}+\frac{3}{4}x^{4}+ \ldots, then the value of e1+ye^{1 + y} at x=12x =\frac{1}{2} is:

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