If D is the distance from any point on f(x) to the origin:
D=
At what x value is f(x) closest to the origin?
x=
1
Expert's answer
2012-11-15T07:47:24-0500
let A point on f(x) then it have coordinates (x, 2x+5)and we must find distance from this point to (0, 0) D=sqrt( x^2+(2x+5)^2)=sqrt(5x^2+20x+25) min value at vertex of 5x^2+20x+25 x=-2
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