Question

please write each and every step​

Answer 1

I hope this helps you.

Answer 2

Answer:

Yes its in AP cause every term had equal difference of 7

Step-by-step explanation:

Now a=-12; d=7; n=20

an=a+(n-1)d

an=-12+(20-1)*7

an=-12+19*7

an=-12+553

an=541