Fill in the blanks :
(i)The product of two positive rational number is always ...
(ii)The product of a positive rational number and a negative rational number is always ...
(iii)The product of two negative rational numbers is always...
(iv)The reciprocal of a positive rational number is ...
(v)The reciprocal of a negative rational number is...
(vi)Zero has .. reciprocal .
(vii)The product of rational number and its reciprocal is ...
(viii)The numbers ... and .. are their own reciprocal
(ix)If `a` is reciprocal of `b`, then the reciprocal of `b` is ...
(x)The number `0` is... the reciprocal of any number.
(xi)Reciprocal of `1/a , a\ !=0\ i s ddot`...
(xii)`(17 xx 12)^(-1)=17^(-1)xx... `

Explanation

(i)The product of two positive rational number is always positive.
(ii)The product of a positive rational number and a negative rational number is always negative.
(iii)The product of two negative rational numbers is always positive.
(iv)The reciprocal of a positive rational number is positive.
(v)The reciprocal of a negative rational number is negative.
(vi)Zero has no reciprocal.
(vii)The product of rational number and its reciprocal is `1`.
(viii)The numbers `-1` and `1` are their own reciprocal.
(ix)If `a` is reciprocal of `b`, then the reciprocal of `b` is`a`
(x)The number `0` is not the reciprocal of any number.
(xi)Reciprocal of `1/a , a\ !=0\ `is `a`.
(xii) `(17 xx 12)^(-1)=17^(-1)xx 12^(-1) `