Question

For the sequence an = ⌊√2n+ 1/2⌋, a7is ____________

(a) 1

(b) 7

(c) 5

(d) 4

This question was posed to me in an interview.

My question is based upon Sequences and Summations topic in chapter Basic Structures: Sets, Functions, Sequences, Sums and Matrices of Discrete Mathematics

Answer 1

Right answer is (d) 4

For explanation I would say: a7 = ⌊√14+1/2⌋ which is ⌊4.24⌋ = 4.