A is a natural number greater than 0. When a (), a of 5 is a true fraction
1.2.3.4
The natural numbers adjacent to natural number n (n is greater than or equal to 1) are
N plus one and n minus one
The two natural numbers adjacent to n (n is a non-zero natural number) are () and () respectively. The sum of these three numbers is ()
The two natural numbers adjacent to n (n is a non-zero natural number) are (n-1) and (n + 1) respectively. The sum of these three numbers is (3n)