Pergunta

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

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IslaineMestre · Tutor por 5 anos
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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}
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}
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