A-Level Maths: G3-16 Gradients: Determining Types of Stationary Points Example 2

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Thank you for the video Sir! Just learnt this in lesson so this was perfect timing and helped reinforce my knowledge

mujtabaali
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so this means that you can choose to do the second derivative test or look to the gradient of each side by replacing minimung values and get the same answer? about it is minimum or maximum local?

eduardobarreto
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Much easier to plug in x values to find min/max. Just my view.

stephencharles
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Is it required that you simplify the second derivative as well?

jombo