Practice problem
What is the domain of f(x)=1+x+1−xf(x) = \sqrt{1+x} + \sqrt{1-x}f(x)=1+x+1−x?
∅\emptyset∅
(0,1)(0,1)(0,1)
[0,1][0,1][0,1]
(−1,1)(-1,1)(−1,1)
[−1,1][-1,1][−1,1]
(0,∞)(0,\infty)(0,∞)
[0,∞)[0,\infty)[0,∞)
(1,∞)(1,\infty)(1,∞)
(−∞,∞)(-\infty,\infty)(−∞,∞)
Type a concept, like “slope” or “photosynthesis”.