Pembahasan Ujian PAI: A30 – No. 6 – April 2019

Consumer Surplus

1. \(Cs = \int\limits_{{P_d}}^P {f\left( P \right)\,dP} \)

• Ketika P = 0
  \(P = 20 – 0,5{Q_d}\) \(0 = 20 – 0,5{Q_d}\) \(0,5{Q_d} = 20\) \({Q_d} = 40\)
• Ketika Q = 0
  \(P = 20 – 0,5{Q_d}\) \(P = 20 – 0,5(0)\) \(P = 20\)
• Sehingga \(\left( {P,Q} \right) = \left( {20\,,\,\,40} \right)\)