Question

Find 6th term from the end of the ap 5,2,-1,-4,............-31

Answer 1

Answer:

here, a=5, d=2-5=-3, n=6, l=-31

6th term from last={l-(n-1) d}={-31-(6-1) (-3) }={-31+15}=-16

Answer 2

Answer:

a = 5

d = -3

n = ,6

an = a + ( n - 1 ) d

an = 5 + ( 6 - 1 ) -3

an = 5 + ( 5 ) 3

= 5 + 15

= 20