यदि (f(x)=x-2-9) और codomain \(\mathbb{R}\) है, तो वास्तविक डोमेन \(\mathbb{R}\) पर रेंज क्या है?
If (f(x)=x-2-9) and the codomain is \(\mathbb{R}\), what is the range on real domain \(\mathbb{R}\)?
Explanation opens after your attempt
Correct Answer
A. \([-9,\infty\))
Concept
Since \(x^2\ge 0\), \(x^2-9\ge -9\). In exams keep the difference between codomain and actual range clear.
Why this answer is correct
The correct answer is A. \([-9,\infty\)). Since \(x^2\ge 0\), \(x^2-9\ge -9\). In exams keep the difference between codomain and actual range clear.
Exam Tip
क्योंकि \(x^2\ge 0\), इसलिए \(x^2-9\ge -9\)। परीक्षा में codomain और actual range में फर्क रखें।
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