Question

summary of exponents and powers class 7​

Answer 1

an is known as the nth power of a and is read as 'a raised to the power n'. The rational a is called the base and n is called the exponent or power. e.g. 10,000 = 10 × 10 × 10 × 10 = 104.

Here, 'a' is called the base and 'n' is called the 'exponent' or 'index'. The number an is read as 'a raised to the power of n' or simply as 'nth power of a'. The notation an is called the exponential notation or power notation. We can write large numbers more conveniently using exponents.