Question

Which expression gives the number in the nth position of the sequence? A) 2n + 2 B) 2n C) 3n - 1 D) 3n + 3 E) 4n

Answer 1

Answer:

The nth position in the sequence is the number in the nth term of the sequence.

Explanation:

Basically nth term is the expression itself. In mathematics nth term is expressed in the form of n which is actually the expression itself.

The nth term corresponds to the value of n. If n = 3 and the expression is 2n, then the nth term would be 6 (2x3). All expressions given in the question may have their own nth term based on the value of n. Let’s have a look at these examples:

When n = 5,

- 2n + 2 = 2(5) + 2 = 12

- 2n = 2(5) = 10

- 3n – 1 = 3(5) - 1 = 14

- 3n + 3 = 3(5) + 3 = 18

- 4n = 4(5) = 20

Answer 2

The answer is C) 3n-1