Jawabanmu

2014-04-28T13:11:37+07:00
Un = 5-3n²
U6 = 5-3.6²=5-108=-103
U4 = 5-3.4²=5-48=-43
U6-U4=-103-43=-146
eh maaf seharusnya -143+43=-60.makasih koreksinya
oke
2014-04-28T14:17:39+07:00
U6=5-108=-103 u4=5-48=-43 #-103-(-46)=-60