Use the following function rule to find f(1) f(x)=-7(7)^x-9 f(1)= square

To find $f(1)$ using the given function rule $f(x) = -7(7)^x - 9$, we need to substitute $x = 1$ into the function.

Given:
$$f(x) = -7(7)^x - 9$$

Substitute $x = 1$:
$$f(1) = -7(7)^1 - 9$$

Calculate $(7)^1$:
$$(7)^1 = 7$$

Now substitute this value back into the equation:
$$f(1) = -7 \cdot 7 - 9$$

Perform the multiplication:
$$-7 \cdot 7 = -49$$

Finally, subtract 9:
$$f(1) = -49 - 9 = -58$$

So, the value of $f(1)$ is:
$$\boxed{-58}$$