Laws of indices - OCRLetters or numbers to the power of zero
An index, or power, is the small floating number that appears after a number or letter. Indices show how many times a number or letter has been multiplied by itself.
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 index numberA number that is mutiplied by itself one or more times is raised to a power. The power is the index number. The plural is indices. rule) and \(j^2 \div j^2 = 1\), which means \(j^0 = 1\).