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Differentiate x^2 + y^2 with respect to x

use the chain rule on the y^2 term to get 2y*(dy/dx) hence the overall solution is 2x + 2y*(dy/dx)
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Answered by Ken D. • Maths tutor
26633 Views

Solve the equation d/dx((x^3 + 3x^2)ln(x)) = 2x^2 + 5x, leaving your answer as an exact value of x. [6 marks]

This may look complicated at first but it can be broken down into a number of simple steps... For the left side of the equation, the d/dx tells you we are differentiating and since (x 3 + 3x 2 )ln(x) sees tw...
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Answered by Robbie H. • Maths tutor
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How should I approach a 30 mark essay question?

There are three key ingredients to a good 30 mark question: A strong arguement, explanation of key concepts and then revelant, and as recent, examples as possible. Although you have a short amount of time in...
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Answered by Kate R. • Politics tutor
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When is the subjunctive required?

The subjunctive is a mood used in French to express uncertainty, doubt, volition, fear and other emotions. Its use can be triggered by certain verbs or subordinative conjunctions. It is used in subordinate c...
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Answered by Yann D. • French tutor
3136 Views

How do you rationalise the denominator?

Defintions Rationalising the denominator means rewriting a fraction so that the bottom only contains rational numbers. Remember: A rational number is one that can be made by dividing two whole numbers (e.g. ...
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Answered by John O. • Maths tutor
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