追赶法求三对角方程组 参数：a为下次对角元素向量, b是主对角元素向量,c为上次对角元素向量，f为右端向量-Chase method for three diagonal equations Parameter: A for the next diagonal element vector, B is the main diagonal element vector, C for the last diagonal element vector, f for the right side

Geodesic calculation of theodolite lines

Calculate the molar volume of a gas mixture consisting of 50 mol propane (1), 20 n-butane (2), and 30 n-pentane (3) at 393 K and 40 bar using: (a) van der Waals equation of state. (b) Peng-Robinson equation of state-Calculate the molar volume of