$$f(x)=1-3 x^2$$

Find the derivative of the function above using the definition of the derivative.

Which of the following is the domain of the function?

A. Middle Earth
B. Nonnegative real numbers
C. Positive real numbers
D. $x\geq -1/2$
E. All real numbers except 0
F. $x> -1/2$
G. x= 3
H. All real numbers
I. Integers

Which of the following is the domain of the derivative?

A. Integers
B. Positive real numbers
C. $x\geq -1/2$
D. Middle Earth
E. All real numbers except 0
F. x=3
G. All real numbers
H. $x> -1/2$
I. Nonnegative real numbers