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nickmoose04
22.07.2021 •
Mathematics
PLEASE HELP
Identify the first five terms of the sequence in which a, = 3n2 - 1.
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Ответ:
Step-by-step explanation:
you cannot just put the actual numbers in and calculate ?
and you can't provide the correct problem statement, as it seems.
I assume you mean
an = 3n² - 1
a sequence starts with a1, so, n>=1
a1 = 3×1² - 1 = 3-1 = 2
a2 = 3×2² -1 = 3×4 - 1 = 12 - 1 = 11
a3 = 3×3² - 1 = 3×9 - 1 = 27 - 1 = 26
a4 = 3×4² - 1 = 3×16 - 1 = 48 - 1 = 47
a5 = 3×5² - 1 = 3×25 - 1 = 75 - 1 = 74
there, that is all there is to it. you really needed help with that ?
Ответ:
12.56km
Step-by-step explanation:
c=2πr
c=2*π*2km
c=2*6.28km
c=12.56km
mark brianliest if my answer suit your question..