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यदि `11sqrt(n)=sqrt(112)+sqrt(343)`, तो `n` का मान क्या होगा?
A. 3
B. 11
C. 19
D. 7

1 Answer

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Correct Answer - D
`11sqrt(n)=sqrt(112)+sqrt(343)`
`11sqrt(n)=sqrt(2xx2xx2xx2xx7)+sqrt(7xx7xx7)`
`11sqrt(n)=4sqrt(7)+7sqrt(7)`
`11sqrt(n)=11sqrt(7)`
`sqrt(n)=sqrt(7)`
`n=7`

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