Question

21, 16, 11, 6 , ...The next 3. Terms would be ?And is an = an-1 - 5 a recursive or explicit?

Answer 1

Step by step solution:

This is an arithmetic sequence a, a+d, a+2d, a+3d, ..., where a is the initial term and d the common difference.

For 21, 16, 11, 6, ....

The initial term a = 21 and the common difference is d = 5, then the next 3 terms are

21, 16, 11, 6, 1, -4, -9. This representation is explicit