The question is to determine the range for Vs in which both diodes are on:
--------R1-------+D1- ---------------- -D2+ --------
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Vs R2 R3
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Where R1 = 1Kohm, R2 = 2Kohm, R3 = 2Kohm and Vd=1V
I'm unsure where to start and what the best solution method is.
Thanks in advance.