$$f(x)=\frac{3+x}{1-7 x}$$

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

Which of the following is the domain of the function?

A. Integers
B. All real numbers except 0
C. Nonnegative real numbers
D. Positive real numbers
E. $x= 3$
F. All real numbers except $\frac{1}{7}$
G. All real numbers except $\frac{1}{3}$

Which of the following is the domain of the derivative?

A. All real numbers except $\frac{1}{3}$
B. All real numbers except $\frac{1}{7}$
C. $x=3$
D. Nonnegative real numbers
E. Positive real numbers
F. Integers
G. All real numbers except 0