f(x)=x-11 f(4)
f(4)=4-11
f(4)=-7
This is my work for this function. Is it correct? And can you help me solve the next one?
f(x) =9x3 - x2 + 2 ; f(2)
Substitute f(4) = -7 into the equation for f(x):
f(x) = x - 11 * (-7)
f(x) = x + 77
f(x) =9x3 - x2 + 2 ; f(2)
For this one, f(2) means find the value of f(x) when x = 2, so just put 2 into the equation for f(x) and solve
The way you typed the first question caused Jennifer to misunderstand the problem
If you meant , find f(4) when f(x) = x-11
then you were correct
Oh, okay. Sorry for the confusion! And thank you for the help.
Yes, your work for the first function f(x) = x - 11 and f(4) is correct. You correctly substituted 4 into the function and determined that f(4) = -7.
Now let's solve the second function:
f(x) = 9x^3 - x^2 + 2
To find f(2), substitute 2 into the function:
f(2) = 9(2)^3 - (2)^2 + 2
First, calculate the exponentiation:
f(2) = 9(8) - 4 + 2
Next, perform the multiplication and addition/subtraction:
f(2) = 72 - 4 + 2
f(2) = 70
Therefore, f(2) = 70.