MATHS
posted by Jake
The quadratic function f(x) has roots at x=4 and x=2 and has value of 2 at x=0. Does f(x) have a minimum or maximum?
Find the value of the /minimum/maximum value of f(x).

bobpursley
f(x)=a(x4)(x+2)
2=a(4)(2)
a=1/4
f(x)=1/4 (x4)(x+2)
f'=1/4(x4)1/4(x+2)=0
x+4x2=0
x=1 max or min
f"=2/4 so it is curving down, it is a max at x=1
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