Answer:
Step-by-step explanation:
Step 1: the first term a is 13
Which means a=13 let's make this equation i
And the third term ar^3-1 = 1208
= Ar²= 1208 let's make this equation ii
Step 2: subtititute equation i into equation ii
= 13r²=1208
Divide both sides by 13 it gives us
13r²/13 = 1208/13
r²= 92.92
r= 9.64
So the second term ar^2-1
=ar
= 13. 9.64
= 125.32
