Question

a and of a a-7.2 b = 13 2, 1) find ​

Answer 1

Step-by-step explanation:

An arithmetic progression (AP) is a sequence where the two consecutive terms have the same common difference. It is obtained by adding the same fixed number to its previous term.

The nth term of an AP is

aₙ = a + (n - 1 )d.

a = first term

aₙ = nth term

d = common difference.

Considering the question, we get the value as,

aₙ = a + (n−1)d.

4 = a + (7 - 1) (-4)

4 = a + 6(-4)

4 = a - 24.

4 + 24 = a

a = 28.