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#1




Survival model
Given that a survival model satisfies
S0(x X < z) = [(z^3)  (x^3)] / [(z^3)*(1 + x^3)] Find S0(x  z < X) if x > z The solution: S0(x) = lim S0(xX < z) as z > infinity = 1/ (1 + x^3) How did they get this and then how do you finish the question? 
#2




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#3




s(x x > z) = s(x)/s(z) x > z

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