Differentiation question...

Hello all,

Been trying to figure some equations out... actually owe a lot to this
group for all the help people have given me. So, thanks!

I have a rectangular function with the jump function at + 1/2 and -1/2
and as someone pointed out the differentiation of this would have a
delta function at the same points. So, the books right the
differentiation as follows:

d/dx (rect(x)) = delta(x+ 1/2) - delta(x -1/2).

My question is when you do the differentiation, why do you have the
minus sign between the two terms....

Thanks,
Luca

.

Relevant Pages

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