Nomor 4b .............

4b) 3, 7, 11, 18, a, b
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+8

a = 11 + 8 = 19

3, 7, 11, 18, ....
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+11

b = 11 + 18 = 29

digabung menjadi

3, 7, 11, 18, 19, 29

smoga membantuush_!