TS EAMCET · Maths · Functions
If the range of the function \(f(x)=-3 x-3\) is \(\{3,-6,-9,-18\}\), then which of the following elements is not in the domain of \(f\) ?
- A -1
- B -2
- C 1
- D 2
Answer & Solution
Correct Answer
(A) -1
Step-by-step Solution
Detailed explanation
We have, \(f(x)=-3 x-3\) (i) Let \(f(x)=3\), then we get \[ 3=-3 x-3 \Rightarrow 6=-3 x \Rightarrow x=-2 \] (ii) Let \(f(x)=-6\), then we get \[ -6=-3 x-3 \Rightarrow-3=-3 x \Rightarrow x=1 \] (iii) Let \(f(x)=-9\), then we get \[ -9=-3 x-3 \Rightarrow-6=-3 x \Rightarrow x=2 \]…
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