+0  
 
0
81
1
avatar+702 

recursive formula 

http://prntscr.com/l2cxl6

critical  Oct 5, 2018

Best Answer 

 #1
avatar+3148 
+1

\(t_1 = 1\\ t_{n+1} = t_n + n \\ t_2 = 1 + 2 = 3\\ t_3 = 3 + 3 = 6 \\ t_4 = 6 + 4 = 10 \\ t_5 = 10 + 5 = 15\)

 

This matches up with choice (c)

Rom  Oct 5, 2018
 #1
avatar+3148 
+1
Best Answer

\(t_1 = 1\\ t_{n+1} = t_n + n \\ t_2 = 1 + 2 = 3\\ t_3 = 3 + 3 = 6 \\ t_4 = 6 + 4 = 10 \\ t_5 = 10 + 5 = 15\)

 

This matches up with choice (c)

Rom  Oct 5, 2018

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