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1.9.14 Chain rule (A-level only)

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Question 13

A curve has the equation 2x2−xy+3y+y2=102x^2 - xy + 3y + y^2 = 102x2−xy+3y+y2=10:

a.

Find an expression for dydx\displaystyle \frac{dy}{dx}dxdy​

[5]
b.

Find an equation for the tangent to the curve at the point P(2,1)P(2, 1)P(2,1)

[3]

1.9.14 Chain rule (A-level only) Questions

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