Book: RS Aggarwal - Mathematics
Chapter: 3. Functions
Subject: Maths - Class 11th
Q. No. 12 of Exercise 3C
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12
Find the domain and the range of each of the following real function: f(x) = 1 – |x – 2|
Given: f(x) = 1 – |x – 2|
Need to find: Where the functions are defined.
Since |x – 2| gives real no. for all values of x, the domain set can possess any real numbers.
So, the domain of the function, Df(x) = (-∞, ∞).
Now the given function is f(x) = 1 – |x – 2|, where | x – 2 | is always positive. So, the maximum value of the function is 1.
Therefore, the range of the function, Rf(x) = (-∞, 1)
1
