A function f(x) is said to be even if f(−x) = f(x), and odd if f(−x) = −f(x). Thus, for example, the function given by…

If y = f(x) and f(x) = (1 – x) / (1 + x), which of the following is true? 

If f(x) = x3 – 4x + p , and f(0) and f(1) are of opposite signs, then which of the following is necessarily true