यदि \(a=\sqrt{2}+1\) और \(b=\sqrt{2}-1\), तो (ab) का मान क्या है?

If \(a=\sqrt{2}+1\) and \(b=\sqrt{2}-1\), what is the value of (ab)?

Explanation opens after your attempt
Correct Answer

A. (1)

Step 1

Concept

(ab=\(\sqrt{2}+1\)\(\sqrt{2}-1\)).

Step 2

Why this answer is correct

Using difference of squares, (\(\sqrt{2}\)2-12=2-1=1).

Step 3

Exam Tip

Learn to recognise conjugate forms like (a+b) and (a-b). चरण 1: (ab=\(\sqrt{2}+1\)\(\sqrt{2}-1\)) है। चरण 2: वर्गों के अंतर से (\(\sqrt{2}\)2-12=2-1=1)। चरण 3: (a+b) और (a-b) जैसे संयुग्म रूप पहचानना सीखें।

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Mathematics Answer, Explanation and Revision Hints

यदि \(a=\sqrt{2}+1\) और \(b=\sqrt{2}-1\), तो (ab) का मान क्या है? / If \(a=\sqrt{2}+1\) and \(b=\sqrt{2}-1\), what is the value of (ab)?

Correct Answer: A. (1). Explanation: चरण 1: (ab=\(\sqrt{2}+1\)\(\sqrt{2}-1\)) है। चरण 2: वर्गों के अंतर से (\(\sqrt{2}\)2-12=2-1=1)। चरण 3: (a+b) और (a-b) जैसे संयुग्म रूप पहचानना सीखें। / Step 1: (ab=\(\sqrt{2}+1\)\(\sqrt{2}-1\)). Step 2: Using difference of squares, (\(\sqrt{2}\)2-12=2-1=1). Step 3: Learn to recognise conjugate forms like (a+b) and (a-b).

Which concept should I revise for this Mathematics MCQ?

(ab=\(\sqrt{2}+1\)\(\sqrt{2}-1\)).

What exam hint can help solve this Mathematics question?

Learn to recognise conjugate forms like (a+b) and (a-b). चरण 1: (ab=\(\sqrt{2}+1\)\(\sqrt{2}-1\)) है। चरण 2: वर्गों के अंतर से (\(\sqrt{2}\)2-12=2-1=1)। चरण 3: (a+b) और (a-b) जैसे संयुग्म रूप पहचानना सीखें।