यदि \(f:\mathbb{R}\to\mathbb{R}\), (f(x)=x-6+x-2+1), तो (f) सर्वाच्छादक क्यों नहीं है?
If \(f:\mathbb{R}\to\mathbb{R}\), (f(x)=x-6+x-2+1), why is (f) not onto?
Explanation opens after your attempt
C. क्योंकि (0) नहीं मिलताBecause (0) is not obtained
Concept
\(x^6\ge0\) और \(x^2\ge0\), इसलिए \(x^6+x^2+1\ge1\)। / Since \(x^6\ge0\) and \(x^2\ge0\), \(x^6+x^2+1\ge1\).
Why this answer is correct
सहप्रांत \(\mathbb{R}\) में (0) है, पर वह परास में नहीं आ सकता। / The codomain \(\mathbb{R}\) contains (0), but it cannot be in the range.
Exam Tip
निचली सीमा मिलते ही उससे छोटे सहप्रांत मान खोजें। / Once a lower bound is found, look for codomain values below it.
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