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# Implicit differentiation question. How to find the coordinates. watch

1. The question is y^2/3 + x^2/3 = 8 with gradient 1. Find the coordinates of the points. (answer is meant to be plus or minus 8 for both x and y)
Now i know how to implicit differentiate. I think i have done it right for this question. But i do not know what to do next in order to find the coordinates.
2. (Original post by Nirm)
The question is y^2/3 + x^2/3 = 8 with gradient 1. Find the coordinates of the points. (answer is meant to be plus or minus 8 for both x and y)
Now i know how to implicit differentiate. I think i have done it right for this question. But i do not know what to do next in order to find the coordinates.
After you've implictly differentiated, substitute dy/dx =1 and solve simultaneously with the original equation.
3. (Original post by Nirm)
The question is y^2/3 + x^2/3 = 8 with gradient 1. Find the coordinates of the points. (answer is meant to be plus or minus 8 for both x and y)
Now i know how to implicit differentiate. I think i have done it right for this question. But i do not know what to do next in order to find the coordinates.
differentiate
get a relationship between x and y (some equation)
solve simultaneously with the equation of the curve
4. (Original post by stardude8)
After you've implictly differentiated, substitute dy/dx =1 and solve simultaneously with the origninal equation.
(Original post by TeeEm)
differentiate
get a relationship between x and y (some equation)
solve simultaneously with the equation of the curve
Okay thank you very much guys!
5. (Original post by Nirm)
Okay thank you very much guys!
all the best

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