Class 11MathematicsSequences and Seriesnth term of special series, Sum to n terms and Infinite number of terms
Medium$t_1, t_2, t_3, \ldots, t_{n}$ are positive integers,$S_{n} = t_1 + t_2 + t_3 + \ldots + t_{n}$. Given $S_1 = 1^2, S_2 = 3^2, S_3 = 6^2, S_4 = 10^2, S_5 = 15^2$. Following this pattern,if $S_{10} = k^2$,then $k =$
- A$55$
- B$45$
- C$36$
- D$21$
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