\( S_5 = 4 \cdot \frac(\frac32)^5 - 1\frac32 - 1 = 4 \cdot \frac\frac24332 - 1\frac12 = 4 \cdot \frac\frac21132\frac12 = 4 \cdot \frac21132 \cdot 2 = 8 \cdot \frac21132 = \frac168832 = 52.75 \). - Nelissen Grade advocaten