The first three teams in a geometric sequence are a – 2, a, a + 4, What is the common ratio of be sequence?

Please check the explanation.

Step-by-step explanation:

Given the geometric sequence

a – 2, a, a + 4

so the expression to find the common ratio 'r' of the geometric sequence will be:

⇒

so the ratio becomes

Hence, the common ratio 'r' will be:

VERIFICATION

so the sequence becomes

a – 2, a, a + 4

(4) - 2, 4, (4)+4     ∵ a=4

2, 4, 8

From the sequence it is clear that

4/2=8/4  ⇒ r

2=2    ⇒ r

Hence, the common ration 'r=2' is the same.

Therefore, the common ratio 'r' will be:

i not know

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