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U1 = 4x1 - 17
U1 = -13
U2 = 4x2 - 17
U2 = -9
U3 = 4x3 - 17
U3 = -5
U4 = 4x4 - 17
U4 = -1
Empat suku pertama barisan = -13, -9, -5, -1
2. Un = 2n (n - 2)
U8 = 2x8 (8 - 2)
U8 = 16x6
U8 = 96
u1=4.1 - 17
u1 = -13
u2=4.2-17
u2=8-17
=-9
u3=4.3-17
=12-17
=5
u4=4.4-17
=16-17
=-1
2. un=2n(n-2)
u8=2.8 (8-2)
=16(6)
=96