Question

Given the arithmetic sequence of -3 , 1 , 5 , 9,... fine the 15th term ​

Answer 1

42

Explanation:

Pattern is +3

-3, 1, 5, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42

Answer 2

The 15th term (T15) = 53

Explanation:

Given Information :

a(first term) = -3

d(common difference) :

`T_2-T_1\\\\1-(-3) = 1+3\\=4`

T15 = ?

`T_n = a+(n-1)d\\\\T_1_5 = -3+(15-1)4\\\\T_1_5 = -3+(14)4\\\\T_1_5 = -3 +56\\\\T_1_5=53`