Question

Describe how to get to the next number in words:

n | 1 | 2 | 3 | 4 | 5
1/2 n (n + 1) | 1 | 3 | 6 | 10 | 15

Answer 1

The sequence is obtained by summing the first n natural numbers.

Step-by-step explanation:

The sequence can be obtained by summing the first n natural numbers. Each number in the sequence is the sum of the previous number and the next natural number. Let's break it down step by step:

1. The first term is 1.
2. The second term is 1 + 2 = 3.
3. The third term is 3 + 3 = 6.
4. The fourth term is 6 + 4 = 10.
5. The fifth term is 10 + 5 = 15.

Therefore, the sequence is: 1, 3, 6, 10, 15.