Tolong jawab yang nomor 2 besok dikumpulinnn plss

A)
U1 = 1
U2 = 4
U3 = 7
U4 = 10
U5 =13

b)
U1 = 1
U2 = 10
U3 = 21
U4 = 36
U5 = 55

c)
U1 = 1
U2 = 2
U3 = 4
U4 = 8
U5 = 16

d)
U1 = 6
U2 = 6
U3 =12
U4 =18
U5 = 24

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