what is the maximum value of y=-x^2-x+6 ?

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what is the maximum value of y=-x^2-x+6 ?

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Gerda 7 months 2021-08-06T13:39:33+00:00 1 Answers 3 views 0

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    2021-08-06T13:40:59+00:00

    Answer:

    { \tt{y =  -  {x}^{2} - x + 6 }} \\ { \tt{ \frac{dy}{dx}  =  - 2x - 1}} \\ f {}^{'} (x) =  - 2x - 1 \\ f {}^{'}(1) =  - 2 - 1 \\  =  - 3

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )