When a number $a$ is multiplied by itself $n$ times, we can express it as index notation:
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It is read as ‘$a$ to the power of $n$’.
For example, $7\times 7\times 7\times 7\times 7={{7}^{5}}$ and it is read as ‘$7$ to the power of $5$’.
However, do note that&nbsp;${{7}^{2}},{{7}^{3}},{{7}^{4}},{{7}^{5}}$ and so on are known as ‘powers of $7$’. 
The power here does not refer to the index in this case.

When a number $a$ is multiplied by itself $n$ times, we can express it as index notation:

It is read as ‘$a$ to the power of $n$’.

For example, $7\times 7\times 7\times 7\times 7={{7}^{5}}$ and it is read as ‘$7$ to the power of $5$’.

However, do note that ${{7}^{2}},{{7}^{3}},{{7}^{4}},{{7}^{5}}$ and so on are known as ‘powers of $7$’. 

The power here does not refer to the index in this case.

Index Notation

Index Notation

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