Search Class 10 Questions

1 result found for "proof-flow" in Class 10.

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

\(\sqrt{5}\) को परिमेय मानकर \(a^2=5b^2\) मिलने पर (a) और (b) में साझा गुणनखंड कैसे बनता है?

After assuming \(\sqrt{5}\) rational and getting \(a^2=5b^2\), how does a common factor appear in (a) and (b)?

Explanation opens after your attempt
Correct Answer

A. पहले \(5\mid a\), फिर (a=5k) रखने से \(5\mid b\)First \(5\mid a\), then substituting (a=5k) gives \(5\mid b\)

Step 1

Concept

From \(a^2=5b^2\), \(5\mid a\).

Step 2

Why this answer is correct

Putting (a=5k) gives \(b^2=5k^2\), so \(5\mid b\).

Step 3

Exam Tip

Now (5) becomes a common factor and gives the contradiction. चरण 1: \(a^2=5b^2\) से \(5\mid a\) मिलता है। चरण 2: (a=5k) रखने पर \(b^2=5k^2\), इसलिए \(5\mid b\)। चरण 3: अब (5) दोनों में साझा गुणनखंड बनकर विरोधाभास देता है।

Open Question Page
Ask Friends
Student Class Required

Select your class first

Quiz questions, daily challenge and practice pages will open according to your selected class. Class 11/12 ke liye stream bhi select karein.