Answer:
1
Step-by-step explanation:
The multiplicative inverse of a number is just that number raised to the -1. For 9, that would be 9⁻¹, or 1/9. If you multiply those together, you just get 1.
[tex]9\times9^-^1=\frac{9}{1}\times\frac{1}{9}=\frac{9}{9}=1[/tex]
That is true for any number, anything multiplied by its multiplicative inverse will always be 1.
[tex]a\times a^-^1=\frac{a}{1}\times\frac{1}{a}=\frac{a}{a}=1[/tex]
