Question

Find the 16th term from the end of the AP 7,2,-3, -8, -13.........-113​

Answer 1

Given, a= 7

d =2-7= -5

t16 =?

Now, tn = a+(n-1)d

= 7+(16-1)×-5

=7+(15)×-5

=7-75

=-68

This is required answer.

Answer 2

Answer:

here a=7 , d=-7

An=a+(n-1)d

a16 = 7+(16-1)×(-5)

-68