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Mathematics
Problem
For a geometric series to converge to a finite sum as the number of terms increases indefinitely, which condition must the common ratio
r
r
r
satisfy? a)
0
<
r
<
1
0<r<1
0
<
r
<
1
b)
∣
r
∣
<
1
|r|<1
∣
r
∣
<
1
c)
∣
r
∣
≤
1
|r|\le 1
∣
r
∣
≤
1
d)
r
<
1
r<1
r
<
1
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