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Question Hard Mathematics Chapter 1: Real Numbers 6: Proof of irrationality of √2, √3, √5 Class 10 Level 18

\(\sqrt{2}\) के प्रमाण में कौन-सा गुण सीधे (2) के अभाज्य होने से जुड़ा है?

Which property in the proof of \(\sqrt{2}\) is directly connected with (2) being prime?

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Correct Answer

A. यदि \(2\mid p^2\), तो \(2\mid p\)If \(2\mid p^2\), then \(2\mid p\)

Step 1

Concept

(2) is a prime number.

Step 2

Why this answer is correct

If a prime factor divides \(p^2\), it must divide (p).

Step 3

Exam Tip

Writing this rule makes the proof logical. चरण 1: (2) अभाज्य संख्या है। चरण 2: अभाज्य गुणनखंड यदि \(p^2\) को भाग देता है, तो वह (p) को भी भाग देता है। चरण 3: इस नियम को लिखना प्रमाण को तार्किक बनाता है।

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Question Medium Mathematics Chapter 1: Real Numbers 6: Proof of irrationality of √2, √3, √5 Class 10 Level 17

यदि (p) और (q) सहअभाज्य हैं, तो कौन सी बात असंभव है?

If (p) and (q) are coprime, which situation is impossible?

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Correct Answer

A. दोनों में (1) के अलावा कोई साझा गुणनखंड होनाHaving a common factor other than (1)

Step 1

Concept

Coprime numbers are defined as having only (1) as common factor.

Step 2

Why this answer is correct

Finding any common factor other than (1) is impossible.

Step 3

Exam Tip

Irrationality proofs show exactly this impossible situation. चरण 1: सहअभाज्य संख्याओं की परिभाषा है कि उनका साझा गुणनखंड केवल (1) हो। चरण 2: (1) के अलावा कोई साझा गुणनखंड मिलना असंभव है। चरण 3: अपरिमेयता की सिद्धि इसी असंभव स्थिति को दिखाती है।

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