Question

[2, 1, (1/2), (1/4), x] =

Answer 1

The above sequence is a GP (geometric progression) with the first term 2, and the common ratio 1/2.

nth term of GP = a r(n−1)r(n−1)

So, fifth term of GP = 2 × (1/2)4(1/2)4

= 2 × (1/16)

= 1/8