Discuss the continuity of f(x) in [0,2] f(x)={[cosπx],x≤1|2x−3|[x−2],x>1 where [t] represents the greatest integer function. Number of points at which it is discontinuous is
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Solution
f(x)=⎧⎪
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⎪⎨⎪
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⎪⎩1x=000<x≤1/2−11/2<x≤1−1×−(2x−3)=2x−31<x≤3/2−1×(2x−3)3/2<x<20x=2 Hence we shall discuss continuity at x=0,12,132and2. It can be easily shown that f(x) is discontinuous at all above points. Ans: 4