Top answers

Maths
A Level

How do I solve equations with modulus functions on both sides?

Whilst it is possible to do it algebraically, it's usually easier to solve it graphically. For example: for which values of x is |x+2| = |3x-6|. By sketching the graphs of y=|x+2| and y=|3x-6|, it is e...

SG
Answered by Seb G. Maths tutor
20355 Views

I did all the past papers but I still only achieved a C grade, what am I doing wrong?

Doing the Past Papers only gives you a general idea of what types of questions will come up in your exam. Every exam will be different and will have those particular questions which require knowledge o...

HC
Answered by Hao-Yuan C. Maths tutor
6939 Views

A girl saves money over 200 weeks. She saves 5p in Week 1, 7p in Week 2, 9p in Week 3, and so on until Week 200. Her weekly savings form an arithmetic sequence. Find the amount she saves in Week 200. Calculate total savings over the 200 week period.

In part (a) the majority obtained 403 and some wrote their answer as £4.03, there was the usual crop of arithmetic errors with 2 ×199 = 298 or 498 being quite common. In part (b) the sum formula was us...

SS
Answered by Selena S. Maths tutor
7849 Views

What is the method used for differentiation?

There are a range of methods commonly used for differentation, but my favoured method is as follows:E.g. Differentiate 3x^21) Separate into three separate parts - the Coefficient (the number at the front,...

EH
Answered by Evelyn H. Maths tutor
4989 Views

What is differentiation and why is it useful?

Although differentiation is often taught in an abstract way, it's applications are virtually limitless. It's primary purpose is to determine the gradient of a line at a given point on a curve. Unlike with...

EH
Answered by Evelyn H. Maths tutor
4268 Views

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