Why do you say #y=x^2# decreases on the interval #(-oo, 0]#? Why is #0# included?
1 Answer
Jan 26, 2018
You don't, please read:
Explanation:
When writing interval notation of function, a "turning point" (where a function goes from increasing to decreasing, increasing to constant, constant to decreasing, etc.) is not included in the notation.
The function