Chapter 9 - Section 9.1 - Sequences - 9.1 Assess Your Understanding - Page 647: 38

The first five terms are: $a_1= 1$ $a_2 = 1$ $a_3 = 2$ $a_4 =2$ $a_5= 3$

Use the given recursive formula to find the next four terms: $a_1= 1$ $a_2 = 2- a_1 = 2-1=1$ $a_3 = 3- a_2 = 3-1 = 2$ $a_4 = 4-a_3 = 4-2 =2$ $a_5= 5- a_4 = 5-2=3$