Question

An = 5 - 7n. What is the value of a12?

Answer 1

To find a12 in the sequence an = 5 - 7n, substitute 12 for n, which yields a12 = 5 - 84, resulting in a12 being -79.

Step-by-step explanation:

The student has asked for the value of a12 in the sequence where an = 5 - 7n. To find a12, substitute 12 for n in the given formula:

a12 = 5 - 7(12)

a12 = 5 - 84

a12 = -79

Therefore, the value of a12 is -79.

Answer 2

The value of
`a_(12)=-79`

Step-by-step explanation:

Being the general expression of the sequence:

`a_n=5-7n`

We replace the value n=12 to get

`a_(12)=5-7* 12=5-84=-79`