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Mathematics
Mathematics
Problem
Which of the following infinite geometric series is convergent? a)
0.5
+
1
+
2
+
4
+
…
0.5+1+2+4+\dots
0.5
+
1
+
2
+
4
+
…
b)
4
+
2
+
1
+
1
2
+
…
4+2+1+\tfrac12+\dots
4
+
2
+
1
+
2
1
+
…
c)
5
−
5
+
5
−
5
+
…
5-5+5-5+\dots
5
−
5
+
5
−
5
+
…
d)
3
+
3
+
3
+
3
+
…
3+3+3+3+\dots
3
+
3
+
3
+
3
+
…
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