limx→3([x−3]+[3−x]−(x)), where [.] denotes the greatest integer function, is equal to
A
4
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B
−4
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C
0
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D
does not exist
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Solution
The correct option is B−4 Left hand limit =limx→3−([x−3]+[3−x]−(x))=−1+0−3=−4 and Right hand limit =limx→3+([x−3]+[3−x]−(x))=0−1−3=−4 Therefore, required limit value is −4 Hence, option 'B' is correct.