"\\sqrt{11}= 3.31662479036..." , which cannot be represented in the form p/q , as the fraction part is non-terminating non-recurring .
As this cannot be represented in the form of a rational number, "\\sqrt{11}" is irrational.
Thus, "2+ \\sqrt{11}" is also irrational.
"\\implies 2+\\sqrt{11} \\notin Q"
Proved.
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