Question

Start with 21. Use the rule minus 1 to write a sequence of five numbers. Then,start with minus 2 to write a sequence of five numbers. Compare the two sequences

Answer 1

21, 20, 19, 18, 17

-2, -3, -4, -5, -6

Explanation:

term-to-term rule: -1 (subtract 1)

• starting with 21 the sequence of five numbers is: 21, 20, 19, 18, 17

• starting with -2 the sequence of five numbers is: -2, -3, -4, -5, -6

In the first sequence all the terms are positive and in the second one they are negative