what is the 4th term in a geometric sequence for which a1=10 and r=.5
Mathematics
cheyennetori123
Question
what is the 4th term in a geometric sequence for which a1=10 and r=.5
1 Answer

1. User Answers mreijepatmat
First term a1=10 & r=0.5 & n=4
The formula to find the term =a(n) = a(1)*(r)^(n1)
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