Parametric Curves - Finding Stationary Points : ExamSolutions Maths Revision

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Revising how to find stationary points of parametric curves

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You can, I wouldn't advise it but it does not equal d2y/dt2 divided by d2x/dt2,

The formula is more complex than that.

ExamSolutions_Maths
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Yes, of course. I was just showing one method.

ExamSolutions_Maths
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Could you double differentiate (d²y/dx²) using quotient rule, which eventually gives a positive value (37.3) which means it is a minimum point?

JDOSHProductions
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By subbing t=3 into x=t^4-4t^2 I get x=45 not 49?

AB
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I don't understand how you get minimum point by using the table.

afiqrosli
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i got a negative value when i evaluated the second differential

DavidTyoember