Calculus
Concave up on (−∞,0)\left(-\infty,0\right)
Concave down on (0,∞)\left(0,\infty\right)
Inflection point at x=0x=0
Concave up on (−∞,∞)\left(-\infty,\infty\right)
No inflection points
Concave up on (−∞,3)\left(-\infty,3\right)
Concave down on (3,∞)\left(3,\infty\right)
Inflection point at x=3x=3
Concave up on (−∞,0)∪(3,∞)\left(-\infty,0\right)\cup\left(3,\infty\right)
Concave down on (0,3)\left(0,3\right)
Inflection points at x=0,3x=0,3