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amandaparrish2323
05.10.2019 •
Mathematics
What are the values of a1 and r of the geometric series?
1 + 3 + 9 + 27 + 81
a. a1=1 and r=1//3
b. a1=1/3 and r=1
c. a1=1 and r=3
d. a1=3 and r=1
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Ответ:
r is the common ratio which is that constant ratio found by dividing any term by the term preceding it...
In this case r=3/1=9/3=27/9=etc=3
So a1=1 and r=3, C. is your answer.
Ответ:
its d the vertex is the point