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Question 906413: Let f (x) = x^2 + 4x - 7
(a) Find the coordinates of the vertex.
(x, y) = ___
(b) The [Either max/min] value of f is
f ( __ ) = __
(c) Find the domain and range of f
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Let f (x) = x^2 + 4x - 7
(a) Find the coordinates of the vertex.
(x, y) =
x = -b/(2a) = -4/(2*1) = -2
y = (-2)^2 + 4*-2 -7 = -11
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(x,y) = (-2,-11)
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(b) The [Either max/min] value of f is
f (-2)) = -11
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(c) Find the domain and range of f
Domain:: All Real Numbers
Range:: y >= -11
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Cheers,
Stan H.
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