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1+5+11+19+29+..." to "n" terms "...

1+5+11+19+29+..." to "n" terms "

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Sum up 3+5 + 11 +29 + .... To n terms .

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The sum of the series 1-3+5-7+9-11+ . . . . To n terms is

Find the sum of the series – 1 + 5 + 11 +….to n terms.

The sum of n terms of the series : 5 + 11 + 19+ 29+ 41 . . . is

The sum of n terms of the series : 5 + 11 + 19+ 29+ 41 . . . is

Find the n term and the sum to n terms of the sequence: ( i ) 1+5+13+29+61+......

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If (2 + 4 + 6 + 8 + ……………… to 'n' terms) / ( 1 + 3 + 5 + 7 + ……………. To 'n' terms) = 20/19 find 'n'.