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How to recognise and make the link between probability and the algebraic demands of this question?

While I doubt students will ask this exact question, think it provides the basis for what are usually the most difficult questions in GCSE papers, and students would usually be unsure where to start. My insp...
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Answered by Neeraj K. • Maths tutor
3372 Views

Use the substitution u=x^2-2 to find the integral of (6x^3+4x)/sqrt( x^2-2)

First use the substitution to find du/dx which is 2x. From this we now know that dx= du/2x (just re-arranging.) Substituting that into the integral we now get (6x 3 +4x)/ (sqrt (u) x 2x) du. Cancelling out t...
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Answered by Khalil S. • Maths tutor
10714 Views

Explain opportunity cost

Opportunity cost is the cost of sacrificing the next best alternative to the activity under consideration. In order to explain this I will use a literal example. You are going to watch a football match. Ther...
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Answered by Edward H. • Economics tutor
2809 Views

In a circuit with a 12V battery, 20Ω resistor and 10Ω resistor, all in series, calculate the current that would flow?

This question can be split into two parts, the first is calculating overall resistance: in series the R total = R 1 + R 2 so here R total = 10Ω + 20Ω = 30Ω The second is to choose the relevant equation, pote...
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Answered by Lauren A. • Biology tutor
5517 Views

How should you structure your personal statement?

A personal statement is your way of expressing to the Universities of your choice your passion for your chosen degree, as well as explain how your experiences and knowledge are connected to it.Just like any ...
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2665 Views