1.

य‌‌द‌ि `x=7-4-4sqrt(3)` है ते `(x+1/x)` का मान क्‍या है?A. `3sqrt(3)`B. `8sqrt(3)`C. `14+8sqrt(3)`D. `14`

Answer» Correct Answer - D
`x=7-4sqrt(3)`
`1/ximplies1/(7-4sqrt(3))`
By relationlisation
`1/x=1/(7-4sqrt(3))xx(7+4sqrt(3))/(7+4sqrt(3))`
`=(7+4sqrt(3))/(49-48)=7+4sqrt(3)`
`:. x+1/x=7-4sqrt(3)+7+4sqrt(3)`
`=14`


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