Question

Write a Recursive formula for a(sub1)=0 a(sub2)=2 a(sub3)=6 a(sub4)=12

Answer 1

0 , 2 , 6 , 12...
+2, +4, +6

Answer 2

\[\Large{a_1 = 0 \\ a_n= a_{n-1} +2(n-1)\ ... \{\text{ where } n \ge2\}}\]

Answer 3

got it?

Answer 4

Thanks guys! I'm just now learning set theory. Thank you!