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# Stationary Points using Chain Rule Watch

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1. find the coordinates of the stationary point of the curve

1/x^2 + 4

I know you have to use the chain rule, but got a bit confused... thanks
2. (Original post by ellie12344)
find the coordinates of the stationary point of the curve

1/x^2 + 4

I know you have to use the chain rule, but got a bit confused... thanks
Do you even need to use chain rule...? and just normal differententiation from there.

Unless you meant ?? In which case let and

So

I don't see where you would have problems with this unless you point it out.
3. therefore I'm not sure about when the bottom is 0, because that should make the answer undefined and not zero, but when
So there is a stationary point at x = 0.

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Updated: September 25, 2016
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