यदि \(c=\sqrt{10}+\sqrt{3}\) और \(d=\sqrt{10}-\sqrt{3}\) हैं तो (cd) और (c-d) का सही युग्म कौन-सा है?
If \(c=\sqrt{10}+\sqrt{3}\) and \(d=\sqrt{10}-\sqrt{3}\), which is the correct pair of (cd) and (c-d)?
Explanation opens after your attempt
Correct Answer
A. (7), \(2\sqrt{3}\)
Concept
(cd=10-3=7) and \(c-d=2\sqrt{3}\). In conjugate forms find the product and difference separately.
Why this answer is correct
The correct answer is A. (7), \(2\sqrt{3}\). (cd=10-3=7) and \(c-d=2\sqrt{3}\). In conjugate forms find the product and difference separately.
Exam Tip
(cd=10-3=7) और \(c-d=2\sqrt{3}\) है। संयुग्मी रूप में गुणन और अंतर अलग-अलग निकालें।
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