1.Is the sequence geometric? If so, identify the common ratio.
6, 12, 24, 48, ...
yes; 2
yes, –2
yes; 4
no
2.What is the fifth term of the geometric sequence?
5, 15, 45, ...
1,215
1,875
405
3,645
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OpenStudy (anonymous):
1.A 2.i think might be B
OpenStudy (anonymous):
1) yes it is geometric
OpenStudy (anonymous):
the common ration is 2
OpenStudy (anonymous):
a geometric sequence is a sequence of numbers. that have multiplication or division in common. easy way to find out is take a number. and divide it by the number before. 24/12 = 2. now do the same for another number 48/24= 2. if they are equal. then it is geometric.
OpenStudy (anonymous):
explanations are better than answers fyi
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OpenStudy (anonymous):
15/5 = 3 45/15= 3 so 45*3 gets the next answer
OpenStudy (anonymous):
243
OpenStudy (anonymous):
the fifth term is 243
OpenStudy (anonymous):
i mean the next number. than that number times 3. and so on
OpenStudy (anonymous):
so its C. cause 135*3 = 405
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