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2014-01-14T21:41:13+07:00
1. U6=-5
U10-U2=8B=-2
B=-1/4
U1=-3,75
U10=-6
U2=-4

2. U2=192
U7=6
Beda Geometri= :2
U1=384
1 5 1
2014-01-14T21:43:59+07:00
1.
U6 = a + 5b = -5
U10 - U2 = -2
a + 9b - a - b = -2
8b = -2
b = -4
a + 5b = -5
a - 20 =-5
a = 15

2. 
U2 = a + b = 192
U7 =a + 6b = 6
dikurangi,jadi
-5b = 156
b = 31,2
a + b = 192 
a - 31,2 = 192
a = 223.2