Evaluate the Function f(-1)=1/(2^x)-7

$f (- 1) = \frac{1}{2^{x}} - 7$

Step 1

Replace the variable $x$ with $- 1$ in the expression.

$f (- 1) = \frac{1}{2^{- 1}} - 7$

Step 2

Simplify the result.

Move $2^{- 1}$ to the numerator using the negative exponent rule $\frac{1}{b^{- n}} = b^{n}$ .

$f (- 1) = 2 - 7$

Subtract $7$ from $2$ .

$f (- 1) = - 5$

The final answer is $- 5$ .

$- 5$

Step 3