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show that div (A+B)=div (A) + div(B)
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I have no idea how to start expanding this
never seen anything like that before what does div mean?
divergence. its done using vectors.
oh ok - sorry can't help with that. if i've ever done that in past i've forgotten it!
ok. thanks
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I found the answer here https://www.yumpu.com/en/document/view/9020526/formulae-involving-vector-identities-with-proofs-nabla-formulae-
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