Concept-wise Practice

proof-depth MCQ Questions for Class 10

proof-depth 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 proof-depth.

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

यदि कोई कहे कि \(\sqrt{2}\) अपरिमेय है क्योंकि (2) पूर्ण वर्ग नहीं है, तो विशेषज्ञ स्तर पर कौन-सा सुधार उचित है?

If someone says \(\sqrt{2}\) is irrational because (2) is not a perfect square, what correction is appropriate at expert level?

Explanation opens after your attempt
Correct Answer

A. यह समझ के लिए ठीक संकेत है, पर पूर्ण प्रमाण में परिमेय मानकर विरोधाभास दिखाना चाहिएIt is a useful hint for understanding, but a full proof should assume rationality and show contradiction

Step 1

Concept

Since (2) is not a perfect square, \(\sqrt{2}\) is not an integer.

Step 2

Why this answer is correct

But irrationality needs proving it is not any rational fraction.

Step 3

Exam Tip

Therefore write the contradiction proof using a coprime fraction. चरण 1: (2) पूर्ण वर्ग नहीं है, इसलिए \(\sqrt{2}\) पूर्णांक नहीं है। चरण 2: पर अपरिमेयता के लिए यह भी सिद्ध करना होता है कि वह कोई परिमेय भिन्न नहीं है। चरण 3: इसलिए सहअभाज्य भिन्न वाला विरोधाभास प्रमाण लिखें।

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