Solution: Since we are asked to find the first 5 terms of the sequence, then we have to find ai, az, az, a4 and as. Hence, the values of n to be substituted to an = 2n + 1 are 1, 2, 3, 4, and 5. Step 1. To find ai, substitute 1 to n of an=2n + 1. That is, an= 2n +1 → a1=2(1) + 1 d1= 2+1 di= 3 Step 2. To find az, substitute 2 to n of an=2n + 1. That is, an=2n +1 → az=2(2) + 1 a2= 4+1 az = 5 Step 3. To find az, substitute 3 to n of an= 2n + 1. That is, an= 2n +1 → Az = 2(3) + 1 az = 6+1 az = 7 Step 4. To find 04, substitute 4 to n of an= 2n + 1. That is, an= 2n +1 → 04=2(4) + 1 ax=8+1 24 = 9 Step 5. To find as, substitute 5 to n of an= 2n +1. That is, an=2n +1 → as = 2(5) + 1 as = 10 + 1​