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Show that (1xx2^2+2xx3^2+....+nxx(n+1)^2...

Show that `(1xx2^2+2xx3^2+....+nxx(n+1)^2)/(1^2xx2+2^2xx3+...+n^2xx(n+1))=(3n+5)/(3n+1)`.

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PSEB-SEQUENCES AND SERIES-EXERCISE
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