Question: I need help to solve this problem

How can i get a bifurcation diagram and also identify the types of bifurcation that occur for these equations: 1) fa(x) = a + ln(x) , x>0 2) fa(x) = a - ln(x) , x>0 3) fa(x) = a * ln(x) , x>0 4) fa(x) = a + x - exp(x) , x>0
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