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What are "x" and "y" and why are they used?

The letters "x" and "y", or any other similar letter in an equation, are examples of unknown variables . What this means is that we don't know their value, and often the aim of the game i...
CM
Answered by Colm M. • Maths tutor
8604 Views

How do I find the distance between two point in the plane?

We can use Pythagoras' Theorem applied to co-ordinates of these points.
JV
Answered by Jonathon V. • Maths tutor
4809 Views

What is a derivative?

A derivative is a mathematical description of how one quantity will change with respect to another. For example the 1st derivative of some function will give you the gradient of the tangent at every point on...
JV
Answered by Jonathon V. • Maths tutor
5358 Views

Represent in partial fraction form the expression x/x^2-3x+2

Partial fractions are just another technique to simplify expressions to make them easier to manipulate in more complex questions. This is a low mark questions, testing your skills at using partial fractions ...
MR
Answered by Malachi R. • Maths tutor
7108 Views

The points A and B have position vectors 2i + 6j – k and 3i + 4j + k respectively. The line l passes through both A and B. Find a vector equation for the line l.

First you need to find the vector AB. This is equal to -OA+OB. OA and OB are equal to the position vectors of A and B respectively so -OA+OB= -2i - 6j + k + 3i + 4j + k = i - 2j + 2k = AB Then we can take an...
AT
Answered by Alex T. • Maths tutor
17250 Views