Question

the first team of an arithmetic sequence is 22 and it's last team is 8 .the common difference is -2 .find the number of team​

Answer 1

Answer:

8

Step-by-step explanation:

Let, first term=a

a=22

Let, last term=l

l=8

Let, the number of terms=n

Let, common difference=d=-2

Formula for finding any term= a+(n-1)*d

=> 8 = 22+(n-1)*(-2)

=22+2-2n

=24-2n

8-24=-2n

-16=-2n

n=(-16/-2)

8

Therefore, there 8 terms in the a.p