In the following choices ,which choice represent f(x) and g(x) are a same sunction?
A. f(x)=1 , g(x)=x^0
B. f(x)=x-1 g(x)=(x^2/x)-1
C.f(x)=x^2 g(x)=($${\sqrt{}}$$x)^4
A) isn't true if x = 0 because 00 ≠ 1.
B) isn't true if x = 0 because division by zero is undefined.
C) isn't true if x is a negative number, because of the difficulty of finding the square root of a negative number.
Therefore, ...
