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