1.

If `sqrt(x)+(58)/(sqrt(x))` =31 then which of the following can be the value of x?A. 529B. 931C. 729D. 841

Answer» Correct Answer - d
`sqrt(x)+(58)/(sqrt(x))=31`
Since 31 is an integer `(588)/(sqrt(x))` must be an integer
`therefore sqrt(x)` can be 29 or 2 `rarr` x =841 or 4


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