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Question

12.3+14.5+16.7+=

A
1+loge2
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B
1loge2
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C
2+loge2
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D
2loge2
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Solution

The correct option is B 1loge2
Let S =12.3+14.5+16.7+
S=323.2+545.4+767.6+........
S=1213+1415+1617+.....
We know log(1+X)=(1)n+1xnn
S=1[112+1314+1516+17+.....]
S=1loge(1+1)
S=1loge2

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