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**1. Homework Statement**

My question asks me to sketch the following:

[tex]g(x) = \delta (y+a) + \delta (y) + \delta (y-a)[/tex]

**2. Homework Equations**

**3. The Attempt at a Solution**

I think this is it, but am I correct? I don't recall actually seeing a delta function other than a Kronicker(sp?) delta function, and I'm pretty sure that this isn't one of that type. Research on the web therefore leads me to this (because after trawling my notes I can't actually find anything about it in the entire course!).