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6 results found for "cancellation" in Class 10.

Question Expert Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 14

यदि \(x=\sqrt{2}+\sqrt{3}\), तो \(x^2-2\sqrt{6}\) का मान क्या है?

If \(x=\sqrt{2}+\sqrt{3}\), what is the value of \(x^2-2\sqrt{6}\)?

Explanation opens after your attempt
Correct Answer

A. (5)

Step 1

Concept

(x-2=\(\sqrt{2}+\sqrt{3}\)2=5+2\sqrt{6}).

Step 2

Why this answer is correct

Subtracting \(2\sqrt{6}\) leaves (5).

Step 3

Exam Tip

After squaring, cancel like irrational terms. चरण 1: (x-2=\(\sqrt{2}+\sqrt{3}\)2=5+2\sqrt{6})। चरण 2: इसमें से \(2\sqrt{6}\) घटाने पर (5) बचता है। चरण 3: वर्ग करने के बाद समान अपरिमेय पदों को काटें।

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Question Expert Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 13

यदि (x) अपरिमेय है और \(x+ \sqrt{2}\) परिमेय है, तो (x) का संभावित रूप कौन-सा हो सकता है?

If (x) is irrational and \(x+\sqrt{2}\) is rational, which can be a possible form of (x)?

Explanation opens after your attempt
Correct Answer

A. \(3-\sqrt{2}\)

Step 1

Concept

To make \(x+\sqrt{2}\) rational, (x) should contain a \(-\sqrt{2}\) part.

Step 2

Why this answer is correct

If \(x=3-\sqrt{2}\), then \(x+\sqrt{2}=3\), which is rational.

Step 3

Exam Tip

Look for cancellation of the irrational part. चरण 1: \(x+\sqrt{2}\) को परिमेय बनाने के लिए (x) में \(-\sqrt{2}\) वाला भाग होना चाहिए। चरण 2: \(x=3-\sqrt{2}\) रखने पर \(x+\sqrt{2}=3\), जो परिमेय है। चरण 3: अपरिमेय भाग के कटने की संभावना खोजें।

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Question Expert Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 13

कौन-सा कथन \(\sqrt{5}+\sqrt{20}-\sqrt{45}\) के लिए सही है?

Which statement is correct for \(\sqrt{5}+\sqrt{20}-\sqrt{45}\)?

Explanation opens after your attempt
Correct Answer

A. यह (0) है और परिमेय हैIt is (0) and rational

Step 1

Concept

Write \(\sqrt{20}=2\sqrt{5}\) and \(\sqrt{45}=3\sqrt{5}\).

Step 2

Why this answer is correct

\(\sqrt{5}+2\sqrt{5}-3\sqrt{5}=0\), which is rational.

Step 3

Exam Tip

Terms that look irrational may cancel to give a rational result. चरण 1: \(\sqrt{20}=2\sqrt{5}\) और \(\sqrt{45}=3\sqrt{5}\) लिखें। चरण 2: \(\sqrt{5}+2\sqrt{5}-3\sqrt{5}=0\), जो परिमेय है। चरण 3: अपरिमेय दिखने वाले पद कटकर परिमेय उत्तर दे सकते हैं।

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Question Hard Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 15

किस विकल्प में दी गई संख्या (0) के बराबर है?

Which option is equal to (0)?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{8}-2\sqrt{2}\)

Step 1

Concept

\(\sqrt{8}=2\sqrt{2}\).

Step 2

Why this answer is correct

Therefore \(\sqrt{8}-2\sqrt{2}=0\), which is rational.

Step 3

Exam Tip

Sometimes terms that look irrational cancel completely. चरण 1: \(\sqrt{8}=2\sqrt{2}\) है। चरण 2: इसलिए \(\sqrt{8}-2\sqrt{2}=0\), जो परिमेय है। चरण 3: कभी-कभी अपरिमेय जैसे दिखने वाले पद पूरी तरह कट जाते हैं।

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Question Hard Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 15

यदि \(x=\sqrt{3}+2\) है, तो \(x-\sqrt{3}\) का मान और प्रकृति क्या होगी?

If \(x=\sqrt{3}+2\), what will be the value and nature of \(x-\sqrt{3}\)?

Explanation opens after your attempt
Correct Answer

A. (2), परिमेय(2), rational

Step 1

Concept

Substitute the given value of (x).

Step 2

Why this answer is correct

(x-\sqrt{3}=\(\sqrt{3}+2\)-\sqrt{3}=2), which is rational.

Step 3

Exam Tip

Like irrational terms may cancel, so decide the nature only after simplifying. चरण 1: दिए गए (x) का मान रखें। चरण 2: (x-\sqrt{3}=\(\sqrt{3}+2\)-\sqrt{3}=2), जो परिमेय है। चरण 3: समान अपरिमेय पद कट सकते हैं, इसलिए सरल करने के बाद ही प्रकृति तय करें।

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Question Hard Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 14

निम्न में से कौन-सा योग परिमेय है?

Which of the following sums is rational?

Explanation opens after your attempt
Correct Answer

A. (\(2+\sqrt{3}\)+\(5-\sqrt{3}\))

Step 1

Concept

First look for like irrational terms.

Step 2

Why this answer is correct

(\(2+\sqrt{3}\)+\(5-\sqrt{3}\)=7) because \(\sqrt{3}\) and \(-\sqrt{3}\) cancel.

Step 3

Exam Tip

Opposite irrational terms can produce a rational result. चरण 1: पहले समान अपरिमेय पदों को देखें। चरण 2: (\(2+\sqrt{3}\)+\(5-\sqrt{3}\)=7), क्योंकि \(\sqrt{3}\) और \(-\sqrt{3}\) कट जाते हैं। चरण 3: विपरीत अपरिमेय पदों से परिमेय उत्तर बन सकता है।

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