Q.

Let f(x)=2x36 when [x] is greatest integer less than or equal to x then the number of points in (1,2) where f is discontinuous is______

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answer is 13.

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Detailed Solution

1<x<21<x3<82<2x3<16

4<2x36<10

2x36 is discontinuous at

3,2,1,0,1,2,3,4,5,6,7,8,9

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