The limit of the expression x*[1/x] as x approaches infinity is being analyzed. It is noted that the floor function [1/x] equals 0 for all x greater than 1. Therefore, the limit simplifies to calculating lim_{x -> infinity} 0. The conclusion is that the limit approaches 0. This confirms that as x increases, the value of the expression converges to 0.
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sedaw
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need to calculate lim X->infinity of x*[1/x] , while [] represent floor function .
Question: A clock's minute hand has length 4 and its hour hand has length 3. What is the distance between the tips at the moment when it is increasing most rapidly?(Putnam Exam Question)
Answer: Making assumption that both the hands moves at constant angular velocities, the answer is ## \sqrt{7} .## But don't you think this assumption is somewhat doubtful and wrong?