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a = 102
b = 6
S33 = n/2 ( 2a + (n-1)b)
= 33/2 ( 2.102 + 32.6)
= 33/2 (204 + 192)
= 33/2 (396)
= 33. 198
= 6534
klo g salah, itu tadi D jawabannya,,,,