Thanks!
Follow Math Help Forum on Facebook and Google+
Have you tried drawing a graph? Draw the graph of 1/x and move each point down to the nearest integer y-coordinate.
For $\displaystyle x>0$ it is continuous on $\displaystyle \left[ {\bigcup\limits_{n = 1}^\infty {\left( {\frac{1}{{n + 1}},\frac{1}{n}} \right)} } \right]\bigcup {\left( {1,\infty } \right)}$ Where else?
View Tag Cloud