Respuesta :

shimbi

Answer:

7^-9×÷7^9

7^-18 this one may help you

sudiptharu

Answer:

[tex] {7}^{ - 9} \div {7}^{9} [/tex]

[tex] {7}^{ - 9 - 9} [/tex]

[tex] {7}^{ - 18} \: ans[/tex]

if it is simple divide then

[tex] \frac{1}{ {7}^{18} } \: ans[/tex]