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# Core 3 - Differentiation Watch

1. Find the co-ordinates if the stationary point of the curve with equation y = 1 / x^2 +4

is this correct?

dy/dx = (-1)(2x)(x^2 + 4) ^-2

= -2x(x^2 +4 ) ^-2

x = ), Y = 1/4 > (0, 1/4)
2. (Original post by Custardcream000)
Find the co-ordinates if the stationary point of the curve with equation y = 1 / x^2 +4

is this correct?

dy/dx = (-1)(2x)(x^2 + 4) ^-2

= -2x(x^2 +4 ) ^-2

x = ), Y = 1/4 > (0, 1/4)
Yes, why do would you think you're not? Also you can use wolfram alpha and desmos to check this stuff for yourself.
3. (Original post by RDKGames)
Yes.
thanks
4. you differentiated correctly.... but you don't just put in x = 0

you have to set dy/dx to zero *

-2x(x2 +4 )-2= 0

and solve that

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Updated: September 15, 2016
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