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A curve C has the equation x^3 + 2xy- x - y^3 -20 = 0. Find dy/dx in terms of x and y.

Every term needs to be differentiated in terms of x:

For the x3 term, differentiated it becomes 3x2 (multiply the whole term by the initial p...

ST
Answered by Seb T. • Maths tutor
10269 Views

Why is the derivative of a function its gradient?

So, the easiest way to start thinking about this is by looking at straight lines. The gradient of a straight line is just its slope, which is the difference in the y values between any two points...

CG
Answered by Connor G. • Maths tutor
5305 Views

What are the main macroeconomics variables?

There are 4 main macroeconomic variables that policymakers should try and manage:

1) Balance of Payments
2) Inflation
3) Economic Growth

AG
Answered by Aidan G. • Economics tutor
181528 Views

Discuss Pedro Almodovar's creative influences and to what extent they are present within his films.

Pedro Almodovar's creative influences are clearly visible within many of his films and can be roughly divided into three categories; individual, personal and cultural. First of all, his individual influen...

AJ
Answered by Alice J. • Spanish tutor
6610 Views

How should I approach a primary source question in an exam?

These kinds of questions could ask you to analyse a piece of contemporary text, a picture or an object. However, the way you would go about answering the question would be the same whatever the source, an...

EM
Answered by Emma M. • History tutor
2149 Views

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