If m is a positive integer, a x a x a …. m times is written as am. a is called the base and m is the power. We read it as "a raised to the power m". The power is also called "the index" or "the exponent".
When the power or index is a fraction say then and it is a surd of order n. In this chapter we will study the laws of indices.
then 
and it is a surd of order n. In this chapter we will study the laws of indices.
