21hendlill
30.03.2020 •
Mathematics
If the graph of f(x) = ax' +bx+c, a#0, has a maximum value at its vertex, which of the following conditions must be true?
Select all that apply.
A. a<0
B. -b/2a<0
C. -b/2a>0
D. a>0
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Ответ:
The possible maximum answer could be 40,000.