Question

Determine the domain of the function.

f(x)=√1·x
A. all real numbers
B. x>1
C. x≤1
D.all real numbers except 1

Answer 1

$f(x)=\sqrt{1-x}\\\\The\ domain:1-x\geq0\ \ \ \ \ |subtract\ 1\ from\ both\ sides\\\\-x\geq-1\ \ \ \ \ |change\ signs\\\\x\leq1$

Answer: C. x≤1.