Question

The third term in a sequence is 11.
The term-to-term rule is "take away 4".
Write an expression, in terms of n, for the nth term of the sequence.

Answer 1

Answer:

nth term = 19 - 4(n - 1).

Step-by-step explanation:

This is an arithmetic sequence and the nth term =

a1 + d(n - 1)   where a1 = first  term and d = the common difference.

Here d = -4 and the first term ( working backwards) is  11 + 2(4) = 19.

So the answer is nth term = 19 - 4(n - 1).