The number of points where \( f(x)=\operatorname{sgn}\left(x^{2}-3 ...

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The number of points where \( f(x)=\operatorname{sgn}\left(x^{2}-3 x+2\right)+[x-3] \),
P \( x \in[0,4] \), is discontinuous is (where [.] denotes the greatest

W integer function)
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