Algebra
posted by Robo .
Find the value of c such that the point (4,2) lies in the graph of f(x)= cx^2+3x4.

F(x) = CX^2 + 3X  4.
Xv = b/2a = 3 / 2c = 4,
3 / 2c = 4,
c = 3/8.
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