Question

-321is the term of ap 22,15,8,1......

Answer 1

$\huge\bf\mathbb\pink{SOLUTION:-}$

a=22

d=-7

an=-321

n=?

an=a+(n-1)d

-321=22+(n-1)-7

-321-22=-7n-7

-343+7=7n

-336=7n

n=-336/7

$\huge\bf\boxed{n=-48}$