Question

Find the 20th term from the end of the given A.P. 8, 10, 12,…….,184​

Answer 1

Answer:

to find any term from the end,

take a = last term and d1 = -(d) and proceed as usual.

here a = 184 and d = 2 therefore d1 = -(2) = -2

A20(from the end) = a + (n-1)d1

= 184 + (20-1)(-2)

= 184 + (19)(-2)

=> 184 - 38

=> 146 is the 20th term from the end