1.

यदि `n=7+4sqrt(3)` है तो `(sqrt(n)+1/(sqrt(n)))` का मान ज्ञात करें।A. `2sqrt(3)`B. `4`C. `-4`D. `-2sqrt(3)`

Answer» Correct Answer - B
`n=7+4sqrt(3)`
`n=4+3+4sqrt(3)`
`n=(2)^(2)+(sqrt(3))^(2)+2xx2xxsqrt(3)`
`n=(2+sqrt(3))^(2)`
`sqrt(n)=2+sqrt(3)`
`:. 1/(sqrt(n))=2-sqrt(3)`
`sqrt(n)+1/(sqrt(n))=2+sqrt(3)+2-sqrt(3)=4`


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