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kenny6666 [7]
3 years ago
5

What is the 4th term in a geometric sequence for which a1=10 and r=.5

Mathematics
1 answer:
OlgaM077 [116]3 years ago
3 0
First term a1=10 & r=0.5 & n=4

The formula to find the term =a(n) = a(1)*(r)^(n-1)

a(4th)=10*(0.5)^3 =1.25


proof:


a1=10

a2=10*0.5=5

a3= 5*0.5 = 2.5

a4= 2.5*0.5=1.25
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