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9 results found for "irrational-expression" in Class 10.

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

\(\sqrt{7}+\sqrt{28}+\sqrt{63}\) की प्रकृति क्या है?

What is the nature of \(\sqrt{7}+\sqrt{28}+\sqrt{63}\)?

Explanation opens after your attempt
Correct Answer

B. अपरिमेयIrrational

Step 1

Concept

\(\sqrt{28}=2\sqrt{7}\) and \(\sqrt{63}=3\sqrt{7}\).

Step 2

Why this answer is correct

The total is \(6\sqrt{7}\), which is irrational.

Step 3

Exam Tip

Simplify an expression before deciding its nature. चरण 1: \(\sqrt{28}=2\sqrt{7}\) और \(\sqrt{63}=3\sqrt{7}\)। चरण 2: कुल योग \(6\sqrt{7}\) है, जो अपरिमेय है। चरण 3: किसी अभिव्यक्ति की प्रकृति तय करने से पहले उसे सरल करें।

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

(\left\(\sqrt{11}+2\right\)2) का मान क्या है?

What is the value of (\left\(\sqrt{11}+2\right\)2)?

Explanation opens after your attempt
Correct Answer

A. \(15+4\sqrt{11}\)

Step 1

Concept

Use ((a+b)2=a-2+2ab+b-2).

Step 2

Why this answer is correct

(\(\sqrt{11}\)2+2\sqrt{11}\times2+22=11+4\sqrt{11}+4=15+4\sqrt{11}).

Step 3

Exam Tip

Forgetting the middle term (2ab) is a common mistake. चरण 1: ((a+b)2=a-2+2ab+b-2) लगाएं। चरण 2: (\(\sqrt{11}\)2+2\sqrt{11}\times2+22=11+4\sqrt{11}+4=15+4\sqrt{11})। चरण 3: मध्य पद (2ab) को भूलना सामान्य गलती है।

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

यदि \(x=7+\sqrt{13}\), तो (x-7) कैसी संख्या है?

If \(x=7+\sqrt{13}\), what type of number is (x-7)?

Explanation opens after your attempt
Correct Answer

B. अपरिमेयIrrational

Step 1

Concept

(x-7=\(7+\sqrt{13}\)-7).

Step 2

Why this answer is correct

This leaves \(\sqrt{13}\), which is irrational.

Step 3

Exam Tip

In such expressions, first subtract the matching rational part. चरण 1: (x-7=\(7+\sqrt{13}\)-7) होगा। चरण 2: इससे \(\sqrt{13}\) बचता है, जो अपरिमेय है। चरण 3: ऐसी अभिव्यक्तियों में पहले समान परिमेय भाग घटाएं।

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

\(\sqrt{5}+\sqrt{20}+\sqrt{45}\) की प्रकृति क्या है?

What is the nature of \(\sqrt{5}+\sqrt{20}+\sqrt{45}\)?

Explanation opens after your attempt
Correct Answer

B. अपरिमेयIrrational

Step 1

Concept

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

Step 2

Why this answer is correct

The total is \(6\sqrt{5}\), which is irrational.

Step 3

Exam Tip

Simplify an expression before deciding its nature. चरण 1: \(\sqrt{20}=2\sqrt{5}\) और \(\sqrt{45}=3\sqrt{5}\)। चरण 2: कुल योग \(6\sqrt{5}\) है, जो अपरिमेय है। चरण 3: किसी अभिव्यक्ति की प्रकृति तय करने से पहले उसे सरल करें।

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

(\left\(\sqrt{7}+1\right\)2) का मान क्या है?

What is the value of (\left\(\sqrt{7}+1\right\)2)?

Explanation opens after your attempt
Correct Answer

A. \(8+2\sqrt{7}\)

Step 1

Concept

Use ((a+b)2=a-2+2ab+b-2).

Step 2

Why this answer is correct

(\(\sqrt{7}\)2+2\sqrt{7}\times1+12=7+2\sqrt{7}+1=8+2\sqrt{7}).

Step 3

Exam Tip

Forgetting the middle term (2ab) is a common mistake. चरण 1: ((a+b)2=a-2+2ab+b-2) लगाएं। चरण 2: (\(\sqrt{7}\)2+2\sqrt{7}\times1+12=7+2\sqrt{7}+1=8+2\sqrt{7})। चरण 3: मध्य पद (2ab) को भूलना सामान्य गलती है।

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

यदि \(x=4+\sqrt{7}\), तो (x-4) कैसी संख्या है?

If \(x=4+\sqrt{7}\), what type of number is (x-4)?

Explanation opens after your attempt
Correct Answer

C. अपरिमेयIrrational

Step 1

Concept

(x-4=\(4+\sqrt{7}\)-4).

Step 2

Why this answer is correct

This leaves \(\sqrt{7}\), which is irrational.

Step 3

Exam Tip

First simplify the expression, then identify the nature of the number. चरण 1: (x-4=\(4+\sqrt{7}\)-4) होगा। चरण 2: इससे \(\sqrt{7}\) बचता है, जो अपरिमेय है। चरण 3: पहले अभिव्यक्ति को सरल करें, फिर संख्या की प्रकृति बताएं।

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

\(\sqrt{3}+\sqrt{12}+\sqrt{27}\) की प्रकृति क्या है?

What is the nature of \(\sqrt{3}+\sqrt{12}+\sqrt{27}\)?

Explanation opens after your attempt
Correct Answer

B. अपरिमेयIrrational

Step 1

Concept

\(\sqrt{12}=2\sqrt{3}\) and \(\sqrt{27}=3\sqrt{3}\).

Step 2

Why this answer is correct

The total is \(6\sqrt{3}\), which is irrational.

Step 3

Exam Tip

Decide the nature of the number only after simplification. चरण 1: \(\sqrt{12}=2\sqrt{3}\) और \(\sqrt{27}=3\sqrt{3}\)। चरण 2: कुल योग \(6\sqrt{3}\) है, जो अपरिमेय है। चरण 3: सरलीकरण के बाद ही संख्या की प्रकृति तय करें।

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

(\left\(\sqrt{5}+2\right\)2) का मान क्या है?

What is the value of (\left\(\sqrt{5}+2\right\)2)?

Explanation opens after your attempt
Correct Answer

A. \(9+4\sqrt{5}\)

Step 1

Concept

Use ((a+b)2=a-2+2ab+b-2).

Step 2

Why this answer is correct

(\(\sqrt{5}\)2+2\(\sqrt{5}\)(2)+22=5+4\sqrt{5}+4=9+4\sqrt{5}).

Step 3

Exam Tip

Missing the middle term (2ab) is a common mistake. चरण 1: ((a+b)2=a-2+2ab+b-2) लगाएं। चरण 2: (\(\sqrt{5}\)2+2\(\sqrt{5}\)(2)+22=5+4\sqrt{5}+4=9+4\sqrt{5})। चरण 3: मध्य पद (2ab) को छोड़ना सामान्य गलती है।

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

यदि \(x=3+\sqrt{5}\), तो (x-3) किस प्रकार की संख्या है?

If \(x=3+\sqrt{5}\), what type of number is (x-3)?

Explanation opens after your attempt
Correct Answer

B. अपरिमेयIrrational

Step 1

Concept

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

Step 2

Why this answer is correct

This leaves \(\sqrt{5}\), which is irrational.

Step 3

Exam Tip

Simplify the expression before deciding the nature of the number. चरण 1: (x-3=\(3+\sqrt{5}\)-3) होगा। चरण 2: इससे \(\sqrt{5}\) बचता है, जो अपरिमेय है। चरण 3: अभिव्यक्ति को सरल करके संख्या की प्रकृति तय करें।

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