Question:
In 2n, n is known as
(a) base
(b) constant
(c) exponent
(d) variable
Solution:
(c) We know that an is called the nth power of a; and is also read as a raised to the power n.
The rational number a is called the base and n is called the exponent (power or index). In the same way in 2n,n is known as exponent.