Question

Write as a single power of 7
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Answer 1

`{7}^( - 9) / {7}^(9)`

`{7}^( - 9 - 9)`

`{7}^( - 18) \: ans`

if it is simple divide then

`\frac{1}{ {7}^(18) } \: ans`

Answer 2

7^-9×÷7^9

7^-18 this one may help you