Question

Find a recursive rule for the sequence 2 4 6 10

Answer 1

$\bf 2~~,~~4~~,~~\stackrel{2+4}{6}~~,~~\stackrel{4+6}{10} ~\hfill \stackrel{n^{th}\textit{ value is the sum of the two before it}}{a_n=a_{n-2}+a_{n-1}} \\\\\\ ~\hspace{34em}$