Concept-wise Practice

onto natural function MCQ Questions for Class 12

onto natural function 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 onto natural function.

यदि \(f:\mathbb{N}\to{n\in\mathbb{N}:n\ge4}\) जहाँ (f(n)=n+3), तो (f) के बारे में सही कथन चुनिए।

If \(f:\mathbb{N}\to{n\in\mathbb{N}:n\ge4}\), where (f(n)=n+3), choose the correct statement about (f).

Explanation opens after your attempt
Correct Answer

A. यह आच्छादी हैIt is onto

Step 1

Concept

The first value of (f(n)=n+3) is (4).

Step 2

Why this answer is correct

For every \(y\ge4\), (n=y-3) is a natural number.

Step 3

Exam Tip

In onto proofs, take an arbitrary (y) and find its preimage. चरण 1: (f(n)=n+3) का पहला मान (4) है। चरण 2: हर \(y\ge4\) के लिए (n=y-3) प्राकृतिक संख्या है। चरण 3: आच्छादिता में (y) लेकर उसका पूर्वप्रतिबिंब निकालना मजबूत तरीका है।

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