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यदि sqrt( x) - (1)/( sqrt( x)) = sqrt(5...

यदि `sqrt( x) - (1)/( sqrt( x)) = sqrt(5)` है, तो `x^(2) + (1)/( x^2)` बराबर है:

A

45

B

49

C

47

D

41

लिखित उत्तर

Verified by Experts

The correct Answer is:
C
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