isi-entrance 2009 Q4

isi-entrance · India · solved Sequences and Series Recurrence Relations and Sequence Properties

Find the general term $T_r$ of the sequence $2, 7, 14, 23, 34, \ldots$

$A_1 = 2, 7, 14, 23, 34$ $\Delta_2 = 5, 7, 9, 11$ $\Delta_3 = 2, 2, 2$ $$T_r = \frac{r^3}{3} + \frac{r^2}{2} - \frac{11r}{6} + 5$$

Find the general term $T_r$ of the sequence $2, 7, 14, 23, 34, \ldots$