Answer:
a4 = 123
Step-by-step explanation:
Here, we want to find the value of the 4th term
we simply have n as 4
substituting this, we have;
a4 = (a3)^2 + 2
But a^3 = (a2)^2 + 2 and
so we have ;
a4 = [(a2)^2 + 2]^2 + 2
But a2 = (a1)^2 + 2
a4 = {[(a1)^2 + 2)]^2 + 2}^2 + 2
Now, substitute the value of a1
a4 = (1)^2 + 2)^2 + 2)^2 + 2
a4 = (1 + 2)^2 + 2)^2 + 2
a4 = (3^2 + 2)^2 + 2
a4 = 11^2 + 2
a4 = 121 + 2
a4 = 123
