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- U1 = 2.1 - 3 = -1
- U2 = 2.2 - 3 = 1
- U3 = 2.3 - 3 = 3
- U4 = 2.4 - 3 = 5
b. Un = n(kuadrat) - n +4
- U1 = ! - ! +4 = 4
- U2 = 4-2+4 = 6
- U3 = 9-3+4 = 10
- U4 = 16-4+4= 16