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The domain of the function f(x)=sqrt(x^2...

The domain of the function `f(x)=sqrt(x^2-[x]^2)` , where `[x]` is the greatest integer less than or equal to `x ,` is (a) `R` (b) `[0,oo]` (c) `(-oo,0)` (d) none of these

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