Using indices, we can show a number times itself many times or as another way of writing a square or cube root. Indices make complex calculations that involve powers easier.
Part of MathsNumber
This can be seen in the example of \(j^2 \div j^2\).
Subtract the powers, so \(j^2 \div j^2 = j^{2 - 2} = j^0\).
Any number or letter divided by itself is 1.
This gives \(j^2 \div j^2 = j^0\) (dividing indicescloseindicesIndices is the plural of index. rule) and \(j^2 \div j^2 = 1\), which means \(j^0 = 1\).