AP EAMCET · Maths · Functions
If the range of the function \(f(x)=-3 x-3\) is \(\{3,-6,-9,-18\}\), then which one of the following is not in the domain of f ?
- A \(-1\)
- B \(-2\)
- C \(2\)
- D \(5\)
Answer & Solution
Correct Answer
(A) \(-1\)
Step-by-step Solution
Detailed explanation
\(f(x) = -3x - 3\) \(x = \frac{f(x) + 3}{-3}\) For \(f(x) = 3\), \(x = \frac{3 + 3}{-3} = -2\) For \(f(x) = -6\), \(x = \frac{-6 + 3}{-3} = 1\) For \(f(x) = -9\), \(x = \frac{-9 + 3}{-3} = 2\) For \(f(x) = -18\), \(x = \frac{-18 + 3}{-3} = 5\) The domain values are…
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