Question: Use a computer algebra system to plot y 2 = x 3 4x for x and y between 4 and 4. Show that if

Use a computer algebra system to plot y²= x³− 4x for x and y between −4 and 4. Show that if dx/dy = 0, then y = 0. Conclude that the tangent line is vertical at the points where the curve intersects the x-axis. Does your plot confirm this conclusion?

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