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This is a geometric progression with a factor of -10, so 0.562.
Even numbers. A geometric progression where each number is three times the previous number.
Sounds like a Geometric Progression eg 1-3-9-27-81 etc
15. It's a Geometric Progression with a Common Ratio of 1/5 (or 0.2).
It is a string of numbers where, apart from the first number, each member is a fixed number of times the previous number. So if the first number is 2 and the constant multiple is 3, you have 2, 6, 18, 54, 162 etc.
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This is a geometric progression with a factor of -10, so 0.562.
Even numbers. A geometric progression where each number is three times the previous number.
This is referred to as a geometric progression - as opposed to an arithmetic progression, where each new number is achieved via addition or subtraction.
This appears to be a Geometric Progression with a Common Divisor of -2, so the next term is 50.
Sounds like a Geometric Progression eg 1-3-9-27-81 etc
15. It's a Geometric Progression with a Common Ratio of 1/5 (or 0.2).
There are infinitely many possible answers. If the missing number is the second in the sequence, it could be part of an arithmetic progression and so equal 10.4, or it could be in geometric progression and so would be 4, or harmonic progression which would give 1/0.65 = 1.54, approx. Furthermore, he missing number cold be the first or third in the sequence.
If, by geometric number (?) you mean geometric mean, then the answer is 40.
It is a string of numbers where, apart from the first number, each member is a fixed number of times the previous number. So if the first number is 2 and the constant multiple is 3, you have 2, 6, 18, 54, 162 etc.
An example of an infinite geometric sequence is 3, 5, 7, 9, ..., the three dots represent that the number goes on forever.
A single number, such as 38978567796588 does not constitute a progression.