নিচের কোনটি (√5 - √3) এর সমান? 

A 2/(√3+√5)

B 1/(2√5+√3) 

C (1/√5)+(1/√3)

D √2

Solution

Correct Answer: Option A

  (√5 - √3)
= {(√5 - √3)(√5 + √3)}/(√5 + √3)
= (5 - 3)/(√5 + √3)
= 2/(√5+√3)

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