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DanielleElmas [232]
3 years ago
12

R=9+3swhat is r if s=6

Mathematics
2 answers:
Vera_Pavlovna [14]3 years ago
4 0
R = 9 + 3s        s = 6

R = 9 + 3*6

R = 9 + 18

R = 27
natka813 [3]3 years ago
3 0
R=27 is your answer.
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step-by-step explanation:

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6 0
3 years ago
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Anit [1.1K]
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5 0
3 years ago
The third term of a sequence is 120. The fifth term is 76.8. Write an explicit rule representing this geometric sequence.
juin [17]
The nth term of the geometric sequence is:
an=ar^(n-1)
where 
a=first term
r=common ratio
n=nth term
from the question:
120=ar(3-1)
120=ar^2
a=120/(r^2)....i
also:
76.8=ar^(5-1)
76.8=ar^4
a=76.8/r^4.....i
thus from i and ii
120/r^2=76.8/r^4
from above we can have:
120=76.8/r²
120r²=76.8
r²=76.8/120
r²=0.64
r=√0.64
r=0.8
hence:
a=120/(0.64)=187.5
therefore the formula for the series will be:
an=187.5r^0.8
4 0
3 years ago
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