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Tasya [4]
2 years ago
7

Determine if the sequence below is arithmetic or geometric and determine the common difference / ratio in simplest form.

Mathematics
1 answer:
andreev551 [17]2 years ago
5 0

Answer:

Step-by-step explanation:

This is an arithmetic sequence and the common difference = - 2

You might be a little puzzled by the minus sign in front of the two. You can look at the sequence for the answer. It is going down. A plus 2 would make it go up. Minus signs are always a bit tricky and you have to watch out what you do with them. But the rule is simple

  • a minus common difference produces a sequence that goes down.
  • a plus common difference produces a squence that goes up.

You know that this is an arithmetic sequence because the common difference can be found by adding or subtracting a number from the previous term to get to the next term.

A geometrice sequence would use multiplication or division to get from one term to the next.

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