Question 353502
{{{n+1/n=M}}}
{{{n^2+1=Mn}}}
{{{n^2-Mn+1=0}}}
In order for the quadratic equation to have a real solution, the discriminant must be greater than or equal to 0.
{{{b^2-4ac=M^2-4(1)(1)=M^2-4>=0}}}
{{{M^2>=4}}}
{{{highlight(M>=2)}}}