(a) use a graphing utility to graph the function,
(b) approximate the open intervals on which the function is increasing, decreasing, or constant, (c) Determine whether the function is even, odd, or neither.
1. f (x) 2x+ + 5x4 - x2
2. f (x) = 4x √(3 - x)
3. f (x) = |x + 5|