For the function \( f:(0,1) \rightarrow R, f(x)=\left[2^{n} x\right...

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For the function \( f:(0,1) \rightarrow R, f(x)=\left[2^{n} x\right]+\left\{2^{m} x\right\} \),
P \( (n, m \in N ; nm) \), the number of points of discontinuity of
W. the function can be (where [.]. \{\} represent greatest integer function and fractional part of \( x \) respectively)
(1) 24
(2) 28
(3) 26
(4) 496
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