The question above is from Introduction to the thermodynamics of materials. please solve this question.

9.13* Use the equation AGXS = b(T - Tc)n +cn* to derive the following equation: ? - \1/2 T for n=n(T): neg = - =(- 1- where b>0 TC Hint: Use the Third Law of Thermodynamics to set n = 1 at T = 0. = =