Question

In the sequence 15, 19, 23, 27, ... which term is 83?

Answer 1

Step-by-step explanation:

a=15

d=4

83=15+(n-1)d

83=15+4n-4

72=4n

18=n

83 is the 18 th term

Answer 2

Answer:

83 is the '18'th term of the sequence

Step-by-step explanation:

T₁ = 15

D = 4

Tₙ = 83

To find which term of the sequene is 83

Tₙ = a+(n-1)d

83 = 15+(n-1)4

83 = 15+4n-4

15+4n-4 = 83

15+4n = 83+4

15+4n = 87

4n = 87-15

4n = 72

n = 72/4 = 18

T₁₈ = 83