Answer:
1
Step-by-step explanation:
Consider any rational number
[tex]\frac{a}{b}[/tex] ( a and b are integers , b ≠ 0 )
and its inverse [tex]\frac{1}{\frac{a}{b} }[/tex] = [tex]\frac{b}{a}[/tex]
Then multiplying gives
[tex]\frac{a}{b}[/tex] × [tex]\frac{b}{a}[/tex] = 1