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posted by Kathryn on Wednesday, September 22, 2010 at 12:04pm.
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
Hint: (1-x^n) = (1-x)(1+x+x²+x³+...+x^{n-1})
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