What type of number is 21 prime

For 21 to be a prime number, it would have been required that 21 has only two divisors, i.e., itself and 1. However, 21 is a semiprime (also called biprime or 2-almost-prime), because it is the product of a two non-necessarily distinct prime numbers. Indeed, 21 = 3 x 7, where 3 and 7 are both prime numbers.

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Step-by-step explanation:

a) 0

step-by-step explanation:

i^413 x i^0 = 0 as any number multiplied by a zero is

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