Question

Let [x] be the greatest integer ≤ x. Then the number of points in the interval (-2,1), where the function f(x) = | [x] | + \(\sqrt{x-[x]}\) is discontinuous is _____.

Answer 1

Correct answer is 2

Need to check at doubtful points 

discont at x ∈ I only 

discont at two points