Question

Find the nth term of this number sequence: 15,12,9,6

Answer 1

The nth term of the given number sequence is calculated using the formula an = 15 - 3(n-1).

Step-by-step explanation:

The given number sequence is: 15, 12, 9, 6.

Notice that each term is decreasing by 3. So, we can find the nth term of this sequence by subtracting 3 from the first term (15) n-1 times. Therefore, the nth term is given by the formula: an = 15 - 3(n-1), where n represents the term number.

For example, to find the 5th term, we substitute n=5 into the formula: a5 = 15 - 3(5-1) = 15 - 3(4) = 15 - 12 = 3.

Answer 2

It seems like it is the multiples of three going backward started from 15. Basically, you are subtracting 3 every time, starting from 15.
15,12,9,6,3,0,-3,-6,-9 (the ninth term),-12,-15,-18,-21,-24,-27,-30,-33,-36,etc...
Hope this helped!