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(i) Write sum(r=1)^(n)(r^(2)+2) in expan...

(i) Write `sum_(r=1)^(n)(r^(2)+2)` in expanded form.
(ii) Write the series `(1)/(3)+(2)/(4)+(3)/(5)+(4)/(6)+"…"+(n)/(n+2)` in sigma form.

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