An = -2 + 3/2 (n-1) What is the 21st term of the sequence?

Question

asked Jul 7, 2021 140k views

1 Answer

Bjunc · Answer 1 · 2021-07-11T06:03:21+0000

Answer:

a_(n) = -83/40

Explanation:

Given

a_(n) = -2 + 3/2 (n-1)

In this problem to find 21st term we put 21 in place of n in the equation

$a_(n) = -2 + 3/2 (21-1) = \\a_(n) = -2 + 3/2 (20)\\a_(n) = -2 + 3/40 = (-2*40 +3)/40 \\a_(n) = -83/40\\$

Thus, 21st term is -83/40.