use the function rule f(x) = x * [-1]^x Find the output (f)2

a 4
b 3
c -2******
d 2

I don't understand, please help

unless [ ] is defined as something special,

f(2) = 2*(-1)^2
= 2*(1)
= 2

thanks

To find the output of the function f(x), we need to substitute x with (f)2 in the function rule f(x) = x * [-1]^x.

Since we are given (f)2, we can substitute x with 2 in the function:

f(2) = 2 * (-1)^2

Now, we can simplify the expression:

f(2) = 2 * 1

f(2) = 2

Therefore, the output (f)2 is 2. The correct option is d) 2.

To find the output value of f(x) using the function rule f(x) = x * (-1)^x, you need to substitute the given value of x into the function. In this case, we are given the input value of x as 2.

Let's substitute x = 2 into the function f(x) = x * (-1)^x:

f(2) = 2 * (-1)^2

Now, simplify the expression inside the parentheses:

(-1)^2 = 1

So the expression becomes:

f(2) = 2 * 1

Finally, multiply 2 and 1 to find the output value:

f(2) = 2

Therefore, the output value of f(2) is 2.

Among the given options, the correct answer is d) 2.