Question

Find the 91st term of the arithmetic sequence 4, 6, 8,

Answer 1

184

Explanation:

Find the common difference first d = 6 - 4 = 2

first term a_1 = 4

a_n = (n -1)*d + a_1

a_91 = (91 - 1) * 2 + 4

a_91 is the 91st term:

a_91 = 90*2 + 4

a_91 = 180 + 4 = 184