- #1
Jaco Viljoen
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Homework Statement
The sketch on the previous page shows the graph of a function f, which is a parabola with vertex R, and the graph of a function g, which is a straight line defined by g(x)=-(1/2)x. The graphs of f and g intersect at P and O(the origin). The function f is defined by:f(x)=ax2+bx+c
Df=ℝ, Rf=[-2,∞) and b/(2a)=2.a)Find the coordinates of R.
Homework Equations
g(x)=-(1/2)x
f(x)=ax2+bx+c
Df=ℝ, Rf=[-2,∞) and b/(2a)=2.
The Attempt at a Solution
if b/(2a)=2 then my x coordinate of the vertex = 2 correct? but on the graph it looks more like -2
Is this due to the missing (-)b
I am stumped on this question, I am sure It is quite obvious but I would appreciate a point in the right direction.
Thank you,
Jaco
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