Question

What will be the n^th term of the AP 1, 5, 9, 13, 17…….?

(a) 4n – 3

(b) 3n – 4

(c) 4n + 3

(d) 3n + 4

This question was posed to me in an international level competition.

I want to ask this question from Nth Term of Arithmetic Progression in division Arithmetic Progressions of Mathematics – Class 10

Answer 1

The correct option is (a) 4n – 3

For explanation: Here a = 1 and d = 4

The n^th  term of the AP = a + (n – 1)d = 1 + (n – 1)4 = 1 + 4n – 4 = 4n – 3