The solutions of the equation 2x + 2/x = 7 are the x-coordinates of the points of intersection of the graph of y = x + 2/x and a straight line L

Find the equation of L.

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- May 17th 2009, 11:31 AMsaran35Graphs/equations/point of intersection
The solutions of the equation 2x + 2/x = 7 are the x-coordinates of the points of intersection of the graph of y = x + 2/x and a straight line L

Find the equation of L. - May 17th 2009, 12:17 PMVonNemo19
First find x in the first equation

So this particular value of x lies on the graph of the equation and is also a point on the line .

Can you take it from here?

I'll give you a hint.

Plug the values and into the equation . They are two points on L. - May 18th 2009, 04:20 PMmathswend
2x +2/x = 7

subtract x from both sides

x + 2/x = 7 - x

so you need to draw y = x + 2/x and the straight line y = 7 - x

It's as simple as that!! - May 18th 2009, 06:03 PMVonNemo19
yes