When multiplying a number by 3.14, which is the simplified version of pi, it will give a constant term. But, when multiplying by π, the actual value is equal to 22/7, and it is a non-terminating decimal. Therefore, when you multiply any number with 3.14, it will be slightly lesser than when you multiply with π.
The first term occurs when . Next the second term occurs when , the third term when and so on. Therefore, the appropriate value of n that lies on the domain for n is