Answer:
The answer is
[tex] \frac{1}{7} [/tex]
Step-by-step explanation:
Using the rules of indices
[tex] {a}^{ - b} [/tex]
Can be written as
[tex] \frac{1}{ {a}^{b} } [/tex]
So
[tex] {7}^{ - 1} [/tex]
Can be written as
[tex] \frac{1}{7} [/tex]
Hope this helps you.
