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Jawaban

1.a. 15,19,23,27,31,35,38

 b. 5,8,12,17,23,30,38,47

 c. 80,25,76,30,72,35,68,40,64

 d. 9,6,3,0,-3,-6

2.a. U2+U5 = -8 + 8

                   = 0

  b. U5 – U1 = 8 – (-12)

                    =20

  c. U6 – U2 + U3 = 12 – (-8) + (-4)

                             = 16

3.a. U5 = – 4

            = 26

  b. U1 = – 4 = 2

      U2 = – 4 = 8

      U3 = – 4 = 14

  c. U1 + U2 + U3 = 2 + 8 + 14 = 24

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