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astraxan [27]
3 years ago
9

Which of the following is an arithmetic sequence?

Mathematics
1 answer:
madreJ [45]3 years ago
8 0

Answer:

A

Step-by-step explanation:

A is an arithmetic sequence with first term -2 and common difference 5.  Each new term is found by adding 5 to the previous term.

B is a geometric sequence with first term 1 and common ratio 1/2.

C is neither an arithmetic nor a geometric sequence.

D is neither.  We might call it an "alternating sequence."

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Use Pythagorean theorem to solve.
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b^2 = 196-36
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Take the square root of both sides.
b = sqrt 160
As a decimal
b = 12.649
As a simplified radical
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