The answers to exercise marked [BB] can be found in the Back of the Book.Let a,b,c be real...

The answers to exercise marked [BB] can be found in the Back of the Book.

Let a,b,c be real numbers and define ƒ: R → R by f(x) = x3 +ax2 + bx + c. Prove lhat ƒ is one-to-one if and only it x1≠ x2implies