If the product of two whole numbers is 1, can we say that one or both of them will be 1? Justify through examples.

a x 1 = a -1 x a

∴ Clearly a must be = 1

Thus, both the numbers should be 1 i. e., 1 x 1 = 1

a x 1 = a -1 x a

∴ Clearly a must be = 1

Thus, both the numbers should be 1 i. e., 1 x 1 = 1