In the function y is equal to lfloor x rfloor minus 1 , which values of the function are equivalent?

The floor function ⌊x⌋ gives the greatest integer less than or equal to x, and subtracting 1 preserves equality whenever two inputs have the same floor. For 2 and 1.9, both floors are 1, so both function values are 1 − 1 = 0. The other pairs fall in different floor intervals, so their function values are not equal.

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