1.

Find the indicated terms in each of the following arithmetic progression:1, 6, 11, 16, ..., t16,

Answer»

Given: 1, 6, 11, 16, …

Here, a = 1

d = a2 – a1 = 6 – 1 = 5

and n = 16

We have,

tn = a + (n – 1)d

So, t16 = 1 + (16 – 1)5

= 1 + 15×5

t16 = 1 +75

t16 = 76



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