1.

If `t_n` denotes the nth term of the series 2+3+6+11+18+….. Then `t_50` isA. `49^2-1`B. `49^2`C. `50^2+1`D. `49^2+2`

Answer» Correct Answer - D
`2+3+6+11+18+…`
`=(0^(2)+2)+(1^(2)+2)+(2^(2)+2)+(3^(2)+2)+…`
Hence, `t_(50)=49^(2)+2`.


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