Question

Urgent, please help, I really appreciate (100 points)

Which sequence isn't a geometric
progression?

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Answer 1

3, 6, 9, 12 would not be a geometric sequence.

Explanation:

The reason for this is because, geometric sequence is multiplication or division while arithmetic is addition and subtraction.

1, 5, 25, 125 is multiplication. x5

4, 8, 16, 32 is multiplication as well. x2

2, 6, 18, 54 is multiplication as well. x3

While 3, 6, 9, 12 would be +3.

Therefore, 3,6, 9, 12 would not be a geometric sequence.

Answer 2

3, 6, 9, 12 is not geometric

Explanation:

A geometric progression has a common ratio r between consecutive terms.

3, 6, 9 , 12

has a common difference of 3 between terms and is arithmetic

1, 5, 25, 125

r = 5 ÷ 1 = 25 ÷ 5 = 125 ÷ 25 = 5 ← geometric

4, 8, 16, 32

r = 8 ÷ 4 = 16 ÷ 8 = 32 ÷ 16 = 2 ← geometric

2, 6, 18, 54

r = 6 ÷ 2 = 18 ÷ 6 = 54 ÷ 18 = 3 ← geometric