Concept-wise Practice

range gaps MCQ Questions for Class 12

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Practice Questions

1 questions tagged with range gaps.

यदि \(f:\mathbb{R}\to\mathbb{R}\), (f(x)=\lfloor x\rfloor+x), तो सर्वाच्छादकता के बारे में कौन सा कथन सही है?

If \(f:\mathbb{R}\to\mathbb{R}\), (f(x)=\lfloor x\rfloor+x), which statement about onto property is correct?

Explanation opens after your attempt
Correct Answer

B. यह सर्वाच्छादक नहीं क्योंकि ((1,2)) के कुछ मान छूटते हैंIt is not onto because some values in ((1,2)) are missed

Step 1

Concept

If \(x\in[n,n+1\)), then \(\lfloor x\rfloor=n\) and \(f(x)\in[2n,2n+1\)).

Step 2

Why this answer is correct

Hence values in intervals such as ((1,2)) are missed.

Step 3

Exam Tip

For floor functions, split the domain into unit intervals. चरण 1: यदि \(x\in[n,n+1\)), तो \(\lfloor x\rfloor=n\) और \(f(x)\in[2n,2n+1\))। चरण 2: इसलिए ((1,2)) जैसे अंतराल के मान छूट जाते हैं। चरण 3: महत्तम पूर्णांक वाले फलनों में प्रांत को छोटे अंतरालों में बाँटें।

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