Question

please solve this quickly

Answer 1

here in this AP, a=10,D=-3 and last term is -62
to find the last term of AP,there is a formula, but it can be done in another way,
you can reverse the AP, so it will be,
-62,-59,-56.....10
now D=3,a=-62 and last term is 10, I think now you can solve this easily