Advanced MathEasyGreatest value of a downward parabola
Advanced Math practice question
The function p is defined by p(x) = −x². What is the greatest value that p(x) can take?
Answer: 0
x² is at least 0, so −x² is at most 0, reached at x = 0.
Common wrong answers
- If you answered 1
- p(x) is never positive.
- If you answered -1
- −1 is p(1) or p(−1), not the maximum.
- If you answered -0.5
- p(x) is 0 at x = 0, which is greater than −0.5.
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