Concept-wise Practice

basic-proof MCQ Questions for Class 12

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Practice Questions

1 questions tagged with basic-proof.

Question 1/1 Easy Mathematics Relations and Functions One-one function Class 12 Level 22

यदि (f(x)=\frac{x+1}{2}) हो तो (f) एकैकी है या नहीं?

If (f(x)=\frac{x+1}{2}), is (f) one-one?

Explanation opens after your attempt
Correct Answer

A. हाँYes

Step 1

Concept

Assume (f(a)=f(b)).

Step 2

Why this answer is correct

\(\frac{a+1}{2}=\frac{b+1}{2}\) gives (a+1=b+1), so (a=b).

Step 3

Exam Tip

A fixed denominator does not break one-one property. चरण 1: (f(a)=f(b)) मानें। चरण 2: \(\frac{a+1}{2}=\frac{b+1}{2}\) से (a+1=b+1) और (a=b) मिलता है। चरण 3: हर में स्थिर संख्या होने से एकैकीपन नहीं टूटता।

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