how to plot a function+function ?

I know how to plot each function separtly, but how is the graph of their addition look like ?

example:

u(t+0.01)+u(t-0.01)

, where u(t) is a unit step function.


thanks

They both have a horizontal shift, one to the left and one to the right. So they are going to jump up to the next integer .2 units apart. For example, from .1 to .8 they have the same value but at .91, u(t+.1) changes value while u(t-.1) does not.

Mark on your graph these points where one function changes values. Figure out the y-values for inbetween these points by hand until you see the pattern. Instead of just going up by the same integer, you are going to have another smaller jump where one function changes while the other hasn't yet.