Zero Indices

Zero Indices

Secondary 3

Let’s simplify \({{a}^{5}}\div {{a}^{5}}\).

Using Law 2 of Indices, \({{a}^{5}}\div {{a}^{5}}={{a}^{5-5}}={{a}^{0}}\),

So what is \({{a}^{0}}\)?

Therefore, \({{a}^{0}}=1\).

In general, for \(n=0\), we define

\({{a}^{0}}=1\)

where \(a\) is any real number and \(a\ne 0\).

We shall now apply the laws of indices when the indices are zero or negative integers.

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