12th grade

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prove that the statement 1/5+1/5^2+1/5^3 +...+1/5^n=1/4(1-1/5^n) is true for all positive integers n, write your proof in the space below

  • 12th grade -

    Hint:
    (1-x^n) = (1-x)(1+x+x²+x³+...+xn-1)

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