Question

what is the ntrh term of 25 20 15 10 5?

Answer 1

the nth term is an=a+(n-1)d
an=25+(n-1)-5
an=25-5n+5
an=30-5n
ok

Answer 2

a=25, d=25-20=-5
an=a+(n-1)d
=25+(n-1)-5
=25+5n+5
=30+5n
=5(6+n)
nth term of the AP is of the form 5(6+n)