Identify the correct sequence represents a infinite geometric sequence.
A
3,6,12,24,48
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B
1+2+4+8+....
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C
1,−1,1,−1,1
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D
1,3,4,5,6....
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Solution
The correct option is C1+2+4+8+.... An infinite geometric series is the sum of an infinite geometric sequence. So, 1+2+4+8+.... is an infinite geometric sequence. Here the common ratio is 2 and it is never ending.