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sol


Non-Standard Calculus

3 2022-01-09 10:46

I don't understand it either, but I also have a different question. By theorem 3 on page 37, if Δu is infinitesimal, why can't we write

st(vΔu/Δx)=st(v)*st(Δu)*st(1/Δx)=v*0*st(1/Δx)=0

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