Question

find the common ratio of the gemetric sequence -320, 80, -20, 5

Answer 1

Answer:

- 0.25

Step-by-step explanation:

Common ratio

$r = \frac{succeeding \: term}{preceding \: term} \\ = \frac{80}{ - 320} \\ = - \frac{1}{4} \\ = - 0.25$

Answer 2

Given that :-

Geometric sequence → -320,80,-20,5

To find :-

Common ratio .

Solution :-

Common ratio = ar/a

→ Here a = -320

→ ar = 80

→ Common ratio = 80/-320

• → Common ratio = -1/4

Let's check it →

Taking a = 80 and ar = -20

→ Common ratio = -20/80

• → Common ratio = -1/4

So common ratio will be -1/4