Question

MATH URGENT HELP!!!

Answer 1

According to table : $a_1= -1.$

$a_2= 1$

$a_3= 3$

$a_4=5$.

Now, we can find common difference, : second term - first term =  1-(-1) = 1+1=2.

We know formula for a recursive sequance of an arithmetic sequence is

$a_n=a_{n-1}+d$, where n is the number of term and d is the common difference.

If we plug d=2 in that formula, we would get

$a_n=a_{n-1}+2.$

Therefore, correct option is second $a_n=a_{n-1}+2$ option.