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I have been asked to find the first and second derivatives of lx-al-lx+al

I have, for the first derivative got, sign(x-a)-sign(x+a)

and for the second, i have: 2(delta)(x-a)-2(delta)(x+a)

am i right in both cases?

I also have to draw them 'schematically' how do i do this?

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# Homework Help: First and second derivatives

**Physics Forums | Science Articles, Homework Help, Discussion**