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February 26, 2015

February 26, 2015

Posted by **Jenny** on Monday, February 11, 2013 at 6:12pm.

a. Sigma (lower n = 4; upper infinity) n(3/4)^n

b. Sigma (lower n = 0; upper infinity) (n+1)(3/4)^n

c. Sigma (lower n = 1; upper infinity) n(3/4)^(n-1)

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