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Verified answer
Barisannya :1 , 5 , -1
3, 7 , 1
5, 9 , 3
7, 11 , 5
a , b , c
a = 7 + 7-5 = 9
b = 11 + 11 -9 = 13
c = 5 + 5 - 3 = 7
suku berikutnya : 9, 13, 7
Verified answer
C.7,19,13mungkin itu