- #1

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My answer :

e^-1/2x { (1+2x )^-1/2 + (1+2x)^1/2 (-1/2) }

In fact i need to find the x-coordinates and according the booklet the answer of the x-coordinate is 0.5 and me i cannot have the answer ( need to equal the dy/dx = 0 ) to find x-coordinate