Question

Find the indicated terms in each of following A.P.s: 1, 6, 11, 16, …; a₂₀

Answer 1

1, 6, 11, 16, …
Here, a = 1, d = 6 – 1 – 5
a₂₀ = a + (n – 1 )d
= 1 + (20 – 1) x 5
= 1 + 19 x 5
= 1 + 95
= 96