Question

An=−2+32(n−1)

What is the 21st term of the sequence?

Answer 1

a₂₁ = 638

Explanation:

substitute n = 21 into the explicit formula

a₂₁ = - 2 + 32(21 - 1) = - 2 + 32(20) = - 2 + 640 = 638