Question

for the sequence (a_n = a_{n-1} + a_{n-2}) and (a_1 = 1, a_2 = 2),
its first term is
its second term is
its third term is
its fourth term is
its fifth term is

Explanation:

Step1: Identify the first term

$$a_1 = 1$$

Step2: Identify the second term

$$a_2 = 2$$

Step3: Calculate the third term

$$a_3 = a_2 + a_1 = 2 + 1 = 3$$

Step4: Calculate the fourth term

$$a_4 = a_3 + a_2 = 3 + 2 = 5$$

Step5: Calculate the fifth term

$$a_5 = a_4 + a_3 = 5 + 3 = 8$$

Answer:

its first term is 1
its second term is 2
its third term is 3
its fourth term is 5
its fifth term is 8