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Verified answer
U1 = 4(1) - 1= 4 - 1
= 3
U2 = 4(2) - 1
= 8 - 1
= 7
U3 = 4(3) - 1
= 12 - 1
= 11
U4 = 4(4) - 1
= 16 - 1
= 15
Jadi, 4 suku pertama nya adalah 3,7,11,15