यदि sqrt(10 - 2sqrt(21)) + sqrt(8+ 2sqrt...

यदि `sqrt(10 - 2sqrt(21)) + sqrt(8+ 2sqrt15)= sqrt(a) + sqrt(b)` जहाँ a और b धनात्मक पूर्णाक हैं, तो `sqrt(ab)` का निकटतम मान है :

A

4.6

B

5.9

C

6.8

D

7.2

लिखित उत्तर

Verified by Experts

The correct Answer is:

B

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