In algebra, letters are used when numbers are not known. Algebraic terms, such as \(2s\) or \(8y\), leave the multiplication signs out. So rather than \(2 \times s\), write \(2s\), and rather than ...

Position to terms rules use algebra to work out what number is in a sequence if the position in the sequence is known. This is also called the nth term, which is a position to term rule that works ...