d) None Find the largest open interval where the function is changing as requested. 3. (4 points) Increasing f(x)= x -2r+1 a) (0, 0o) b) ( 1, 0o) c) (-00, 0) d) (- 4. (4 points) Decreasing f(x) - +7 a) (7, 0o) b) (-7, 7) c) (-7, 0) d) (0