( \left\(\frac{1}{5-\sqrt{21}}\right\)+\left\(\frac{1}{5+\sqrt{21}}\right\) ) का मान क्या है?
What is the value of ( \left\(\frac{1}{5-\sqrt{21}}\right\)+\left\(\frac{1}{5+\sqrt{21}}\right\) )?
Explanation opens after your attempt
A. \( \frac{5}{2} \)
Concept
The common denominator is (25-21=4), and the numerator is (10). So the value is \( \frac{10}{4}=\frac{5}{2} \).
Why this answer is correct
The correct answer is A. \( \frac{5}{2} \). The common denominator is (25-21=4), and the numerator is (10). So the value is \( \frac{10}{4}=\frac{5}{2} \).
Exam Tip
समान हर (25-21=4) और अंश (10) है। इसलिए मान \( \frac{10}{4}=\frac{5}{2} \) है।
Login to save your score, XP, coins and progress.
