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core 1

State the equation of the normal to the curve at its minimum point.The equation of the curve is y = 2x^2 + 5x.
The mark scheme says the answer is x=-5/4.
how do i get to this answer? so far i differentiated the equation.
Original post by Chelsea12345
State the equation of the normal to the curve at its minimum point.The equation of the curve is y = 2x^2 + 5x.
The mark scheme says the answer is x=-5/4.
how do i get to this answer? so far i differentiated the equation.


Set dy/dx = 0 to find the x value at the minimum. Sketch the curve and the normal and you should be able to see what the answer is.

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