meorifaust meorifaust

09-01-2021
Mathematics

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If the maximum value of y =-x²+ax+b is 8 when x = 3, find the values of a and b

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johnsf52 johnsf52

09-01-2021

y' = -2x+a
0 = -2(3)+a
6=a

8=-(3)^2 +(3)(6)+b
b=-1

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