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How do you differentiate ln(f(x))? Tricks like these occur commonly in STEP questions (including one I was looking at earlier today).

Assumed knowledge: The chain rule, implicit differentiation and being able to differentiate exp(x).Chain rule: d/dx = d/dy * dy/dxImplicit differentiation: f(y) = g(x) => f'(y)*dy/dx = g'(x) (where f'(y) ...
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Answered by Joseph R. • MAT tutor
2727 Views

How do I answer a question in the writing part of the exam?

There are several elements that need to be taken into account when replying to a question. To begin with, it is important that you understand what the question is asking; you must be careful not to go off to...
RP
Answered by Rachele P. • Italian tutor
2770 Views

How does the LNAT admissions test work and how should I prepare for it?

The LNAT is the national university admissions test which assesses the aptitude of prospective Law students. Not all universities require Law applicants to take this test, but the best Law schools do, so it ...
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Answered by Lucy S. • LNAT tutor
3265 Views

What is 'e' and where does it come from?

Its called Euler's number but it can be said to be credited also to Bernoulli. Hopefully you are aware of interest on loans from banks, if not, proceed to have a look on Wiki. In short, when you borrow money...
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Answered by Oliver O. • Maths tutor
4461 Views

How many people in a room is required such that the probability of any two people sharing a birthday is over 50 percent?

Probability can be highly intuitive yet at times completely nonsensical. Famous mathematicians have fallen victim to the idea that everything in probability can be done without rigorous calculation and thoug...
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Answered by Oliver O. • Maths tutor
4436 Views