( \left\(\frac{1}{\sqrt{5}-2}\right\)-\left\(\frac{1}{\sqrt{5}+2}\right\) ) का मान क्या है?
What is the value of ( \left\(\frac{1}{\sqrt{5}-2}\right\)-\left\(\frac{1}{\sqrt{5}+2}\right\) )?
Explanation opens after your attempt
A. (4)
Concept
The common denominator is (5-4=1), and the numerator is ( \sqrt{5}+2-\(\sqrt{5}-2\)=4 ). Hence the value is (4).
Why this answer is correct
The correct answer is A. (4). The common denominator is (5-4=1), and the numerator is ( \sqrt{5}+2-\(\sqrt{5}-2\)=4 ). Hence the value is (4).
Exam Tip
समान हर (5-4=1) होगा और अंश ( \sqrt{5}+2-\(\sqrt{5}-2\)=4 ) है। इसलिए मान (4) है।
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