Use the familiar proof to tell that 2 is irrational.
Also product of irrational number and rational number is irrational, so 52 is irrational.
Addition of a rational and irrational number is irrational.
Hence the given number is irrational.
Show that every positive even integer is of the form2q and every positive odd
integer is of the form 2q +1where q is some integer.