Concept-wise Practice

mapping-choice MCQ Questions for Class 12

mapping-choice se related questions ko ek jagah revise karein. Har question me bilingual content, answer feedback aur explanation available hai.

Practice Questions

1 questions tagged with mapping-choice.

यदि \(A=\{1,2,3\}\) और \(B=\{4,5,6,7\}\), तो कौन-सी परिभाषा (A) से (B) तक एकैकी फलन देती है?

If \(A=\{1,2,3\}\) and \(B=\{4,5,6,7\}\), which definition gives a one-one function from (A) to (B)?

Explanation opens after your attempt
Correct Answer

B. (f(1)=4, f(2)=5, f(3)=6)

Step 1

Concept

In a one-one function, different elements of (A) must have different images in (B).

Step 2

Why this answer is correct

In option (B), the images are (4,5,6), with no repetition.

Step 3

Exam Tip

For finite sets, absence of repeated images is the key check. चरण 1: एकैकी फलन में (A) के अलग तत्वों की छवियाँ (B) में अलग होनी चाहिए। चरण 2: विकल्प (B) में छवियाँ (4,5,6) हैं और कोई दोहराव नहीं है। चरण 3: सीमित समुच्चय में दोहराव न होना ही मुख्य जाँच है।

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