Question

What is a27 of the sequence 15 , 10 , 5 , … ?

Answer 1

`a_(27)=-115`

Explanation:

The given sequence is
`15,10,5,...`

The common difference is d=10-15=-5

The first term of this sequence is
`a_1=15`

We want to find the 27th term in this sequence.

The 27th term is given by:

`a_(27)=a_1+26d`

We substitute the values to get:

`a_(27)=15+26(-5)`

`a_(27)=15-130=-115`