Question

The nth term of the AP: 9, 5, 1, -3,....is​

Answer 1

Answer:

The nth term is 13 - 4n

Step-by-step explanation:

9, 5, 1, -3,..

a = 9

d = 5-9 = -4

using formula:

aₙ = a+ (n-1)d

 = 9 + (n - 1)(-4)

 = 9 - 4n +4

 = 13 - 4n

Answer 2

Answer:

$13 - 4n$

Step-by-step explanation:

By observing the A.P. we find that

$a = 9 \\ d = 5 - 9 = - 4$

The nth term of the A.P. is

$a(n) = a + (n - 1)d \\ = 9 + (n - 1)( - 4) \\ = 9 - 4n + 4 \\ = 13 - 4n$

Hence the answer