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I am currently learning Supervised ANN training using Backpropogation and I am stuck in this exercise. I calculated the δA using the equation at the bottom of the screenshot, however, I am unable to calculate δB because the weight of BD is not given. How do I find the weight of BD?

Backpropogation Question

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  • $\begingroup$ Welcome to CS.SE! Please edit the question to cite your sources and provide proper attribution to the source of the material in that image -- see cs.stackexchange.com/help/referencing. Thank you! $\endgroup$
    – D.W.
    Aug 8, 2018 at 20:09
  • $\begingroup$ Please define all notation, including $net_A$ and $f$. $\endgroup$
    – D.W.
    Aug 8, 2018 at 20:11

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As far as I can tell, the information provided does not appear to be enough to answer your question, though I confess I am not familiar with what a "unipolar continuous threshold function" is, and it is not clear to me what $f(\text{net}_A$) represents nor what the loss function for this task is. You might need to talk to your instructor or wherever you got that image from. You might ask them what a "-" over an edge means.

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