A) $ ( -\frac{1}{5},\ \frac{1}{5} ) $
B) $ [ -\frac{1}{5},\ \frac{1}{5} ] $
C) R
D) $ ( 0,\ \frac{1}{5} ) $
Correct Answer: B
$ -1\le 5x\le 1\Rightarrow \frac{-1}{5}\le x\le \frac{1}{5} $ . Hence domain is $ [ \frac{-1}{5},\frac{1}{5} ] $ .
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