A) (?1, 1)
B) (?1, 1)?{0}
C) [?1, 1]
D) [?1, 1]?{0}
Correct Answer: D
$ 1+x\ge 0\Rightarrow x\ge -1 $ ; $ 1-x\ge 0\Rightarrow x\le 1,x\ne 0 $ Hence domain is $ [-1,,1]-{0} $ .
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