Question

Can you please do a deep explanation of how to solve these kinds of problems

Answer 1

The given expression is 7^-2

- 2 is the exponent in this case

recall this rule of exponents,

`\begin{gathered} a^{-\text{ n}}\text{ = }(1)/(a^n) \\ \text{This means that } \\ 7^{-\text{ 2}}\text{ = }(1)/(7^2) \\ =\text{ }(1)/(49) \end{gathered}`