Question

the second term in a geometric sequence is 20. the fourth term in the same sequence is 11.25. What is the common ration in this sequence?

Answer 1

here are the choices it gives me

6 over open parentheses x plus 4 close parentheses open parentheses x minus 2 close parentheses

quantity x plus 4 over 6 open parentheses x minus 2 close parentheses

open parentheses x plus 4 close parentheses open parentheses x minus 2 close parentheses over 6

6 open parentheses x plus 4 close parentheses over x minus 2

Answer 2

so \(A_{2} = 20 \quad \text{and} \quad A_{4} = 11.25\) hmmm...you do know that \(A_2 \times \text{common ratio} = A_{3} \text{and} A_{3} \times \text{common ratio} = A_{4} \) right? do you get what im getting to?

Answer 3

yea