I hope this this is what you need ..
Answer:
A 1:6
Step-by-step explanation:
3:18 simply to 1:6
Answer is A
144 + 12y + y^2
if perfect square should be
144 + 24y + y^2
Fron the table given:
A3 = 112,
A8 = - 3,584
An = A1 *r ^ (n-1)
=> A3 = A1 (r^2) = 112
A8 = A1(r^7) = - 3,584
=> - 3584 / 112 = (r^7) / (r^2)
=> (r^5) = - 32
=> r = - 2
=> A1 (- 2)^2 = 112
=> A1 = 112 / 4 = 28
Answer: a1 = 28