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Ric Flair
Ric Flair asked in Science & MathematicsMathematics · 6 years ago

The line 4y-3x=7 meets the curve 3x^2 -8y=-5 at P and Q. Find the gradient of the curve at P and Q??? How do i do it?

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  • Elizabeth M
    Lv 7
    6 years ago

    First solve the two equations simultaneously to find the coordinates of P and Q. This gives x=-1 and x=3.

    From the equation of the curve,

    8y=3x²+5 so

    8dy/dx=6x and you can now get the gradient (dy/dx) at the two points.

  • alex
    Lv 7
    6 years ago

    3x^2-6x-9=0--->x=-1 or 3

    y' = 3x/4

    y'(-1) = -3/4

    y'(3)=9/4

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