Question

find the number of terms in the sequence -3,0,3_______54

Answer 1

Answer:

6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51

Answer 2

Answer:

Here

First term, a = - 3

Common difference = 3

Last term, an = 54

So using,

an = a + (n - 1)d

54 = - 3 + (n - 1)×3

57 = 3n - 3

3n = 60

n = 20