The first three terms of a geometric sequence are as follows. 6,-12,24. Find the next two terms of the sequence. Give exact values (not decimal approximations)
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OpenStudy (sierra_grey):
I know 6+(-12)=-18 and -18+36=24, but im not sure what number comes after
OpenStudy (xapproachesinfinity):
what do you think is the pattern here?
OpenStudy (xapproachesinfinity):
Oh no you went wrong in your step!
this a geometric sequence, we are not adding
OpenStudy (sierra_grey):
im confused then, so i dont know what to do now.
OpenStudy (xapproachesinfinity):
from 6 to -12
what happened! remember in geometric sequence we multiply by a common number to get each term we call it common ratio
can you tell me what is that common ratio here
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OpenStudy (sierra_grey):
-2?
OpenStudy (xapproachesinfinity):
correct!
sorry the website was slow
OpenStudy (xapproachesinfinity):
so now we know that each time we multiply by -2 to get the next term
all you need to do is multiply 24 by -2 to get the next term
then what you get multiply it by -2 to get the next term
OpenStudy (xapproachesinfinity):
Give exact values (not decimal approximations) this is just some stupid extra info that has nothing to do with the problem
OpenStudy (sierra_grey):
so -48 and positive 96
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