math
posted by Kathy on .
If f(x)=x7 and g(x)=sqrt(4x), what is the domain of the function f/g?
a. (infinity, 4)
b. (infinity, 4]
c. (4, infinity)
d. [4, infinity)
e. (4, 7) U (7, infinity)

(x7)/sqrt(4x)
If x >4 , the result is imaginary because the denominator is the square root of a negative number so we know x<4 but we also know that the result is undefined for x = 4
so
x < 4 or from 00 to 4 not including 4