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surjective function MCQ Questions for Class 12

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Practice Questions

1 questions tagged with surjective function.

Question 1/1 Expert Mathematics Relations and Functions Onto function Class 12 Level 27

मान लीजिए \(f:\mathbb{R}\to[0,\infty\)) जहाँ (f(x)=x-2+2x+1)। (f) आच्छादी फलन कब माना जाएगा?

Let \(f:\mathbb{R}\to[0,\infty\)) be defined by (f(x)=x-2+2x+1). When will (f) be considered onto?

Explanation opens after your attempt
Correct Answer

A. जब सहप्रांत \([0,\infty\)) ही रहेWhen codomain remains \([0,\infty\))

Step 1

Concept

(f(x)=(x+1)2), so its range is \([0,\infty\)).

Step 2

Why this answer is correct

The codomain is also \([0,\infty\)), so every codomain element is attained.

Step 3

Exam Tip

In exams, first find the range and then compare it with the codomain. चरण 1: (f(x)=(x+1)2) है इसलिए इसका परिसर \([0,\infty\)) है। चरण 2: सहप्रांत भी \([0,\infty\)) है इसलिए हर सहप्रांतीय मान का पूर्वप्रतिबिंब मिलता है। चरण 3: परीक्षा में पहले परिसर निकालें फिर उसे सहप्रांत से मिलाएँ।

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