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- If . Then range of f(x) isOption: 1 [9,
If . Then range of f(x) is
Option: 1
[9,)
Option: 2
(9,)
Option: 3
Option: 4
Answers (1)
We can find range of |x| by simple manipulation
As 0 ≤ |x| < ∞
Multiplying all 3 sides by (-1)
- ∞ < -|x| ≤ 0
Now, adding 9 to all 3 sides
- ∞ < -|x| + 9 ≤ 9
So, range is (- ∞, 9]
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