Question

which whole has no. riciproper (1) 1 (2) -1 (3) 0 (4) 2

Answer 1

0 does not have a reciprocal. The reciprocal of 0/1 is equal to 1/0, but remember that a number divided by zero is undefined. Thus 1/0 is undefined. It's not real. Just because of this, zero can never have a reciprocal.