Question

what is the common ratio for the sequence 80,40,20,10

Answer 1

Hey there!!! Here is the answer ⬇️⬇️⬇️⬇️

Common ratio= 2nd term÷1st term

2nd term =40
1st term =80

Applying the formula,
Common ratio = 40/80
=1/2

Therefore the common ratio is 1/2.

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Answer 2

Answer:

The common ratio is 2.

Step-by-step explanation:

The given geometric sequence is 80, 40, 20, 10.

80/40 = 2

40/20 = 2

20/10 =  2

Thus, the common ratio is 2.

A geometric progression, also known as a geometric sequence, is a sequence of non-zero numbers where each term after the first is found by multiplying the previous one by a fixed, non-zero number called the common ratio.

For example,

1) In the given Geometric sequence  2, 4, 8, 16, 32, 64, …, where the common ratio is 2.

2) In the given Geometric sequence 10,100,1000,10000..........where the common ratio is 10

Formula

a + ar + ar² + ar³ + . . .

a = first term

r = common ratio.