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common ratio of the geometric sequence with a1 = 18 and a4 = −2/3
is either options:

(1) 3

(2) -3

(3) 1/3

(4) -1/3

 Jun 9, 2021
 #1
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-1

can someone please answer this or at least try to help me im having so much trouble trying to figure it out i appreciate it alot 

 Jun 9, 2021
 #2
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0

The common ratio is r

a1=18, a4=-2/3

18, _, _, -2/3

-6/18=-1/3

-2/3 divided by 1/3=-1/3

 

18, -6, _, -2/3

18, -6, 2, -2/3

so (4) -1/3 

is the right answer

 Jun 9, 2021
 #3
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thank you so much!!!!

kirstenday51704  Jun 9, 2021

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