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posted by RS on Friday, May 3, 2013 at 10:54pm.
Find the value of 1/10+1/100+1/1000+1/10000+... Leave your answer as a fraction
you have a geometric series with a = 1/10 and r = 1/10 sum(∞ = a/(1-r) = (1/10) / (9/10) = (1/10)(10/9) = 1/9
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