Question

Write a rule for the nth term of the sequence. Then find a20
12,20,28,36,...
an=
a20 =

Answer 1

Answer:

C

Step-by-step explanation:

on e2020 it's c not a(I checked)

Answer 2

The 20th term of the given arithmetic series 12,20,28,36,...would be equal to 164.

What is arithmetic series?

The arithmetic series is a series in which the numbers are in the order of some common difference. The difference between any two consecutive numbers is constant.

$\rm a_n = a_1 +d(n-1)$

The given series is 12,20,28,36,...

where, the first term is 12

The common difference is 20 - 12 = 8

n = 20

We know that

$\rm a_n = a_1 +d(n-1)$

$a_{20}$ = 12 + 8(20 - 1)

    = 12 + 8(19)

    = 12 + 152

    = 164

Thus, the 20th term of the series is 164.

Learn more about arithmetic series;

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