Question

if 6th term from the end of the AP is 17,14,11,....,-25. find the last term of AP​

Answer 1

Answer:

◆ Given,

AP... 17,14,11..-40

So, now we need the 6th term from last. SO, by reversing the AP, we get;

AP = -40,-37,-31......14,17

Now, Given;

d=3

a1=-40

n=6

Therefore a6= a+(n-1)d

=a

6

=−40+(6−1)3

=a

6

=−40+5∗3

=a

6

=−40+15

=a

6

=−25

So the 6th term is−25

Answer 2

Answer:

6th term from the end = l - (6 - 1)d

= -25 - 5 x (- 3)

= - 25 + 15

= - 10