24. define a function f on the real line by a )-*-lx]-; ifx is not an integer, en 0 if x is an integer which of the follówing is true: (a.) f is periodic with p

24. Define a function f on the real line by A )-*-lx]-; ifx is not an integer, en 0 if x is an integer which of the follówing is true: (a.) f is periodic with period 1, ie., fx+1)=f() for all x (b.) S is continuous (c.) f is one-to-one (d.) lim s(x) exists for all a e R.