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Veseljchak [2.6K]
2 years ago
8

20 Points and will give brainliest to the first correct answer!

Mathematics
2 answers:
olga55 [171]2 years ago
8 0

Answer:

x= -1  x=0

Step-by-step explanation:

olga2289 [7]2 years ago
3 0

Answer:

−1 −12 −12 1 1 12

Step-by-step explanation:

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Arithmetic sequence help!!!!
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1) This is not an arithmetic sequence because it has n².

2) To find 5 first terms of this sequence, you can simply substitute n with 1,2,3,4, and 5, and calculate values of a(1),a(2), a(3), a(4) and a(5).

a(n) = 3n²- 1

n=1 a=3*1² - 1 = 3-1=2

n=2 a=3*2² - 1 = 11

n=3 a=3*3² - 1 =26

n=4 a=3*4² - 1 = 47

n=5 a=3*5² -1 = 74

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Answer C. 2,11,26,47,74.

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