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₉C₄ + ₉C₃ + ₉C₂
₉C₃
9.8.7.6 + 9.8.7 + 9.8
= 4.3.2.1 3.2.1 2.1
9.8.7
3.2.1
= 3.7.6 + 3.4.7 + 9.4
3.4.7
= 126 + 84 + 36
84
= 246
84
= 41
14
Maaf klo kurang tepat, semoga membantu^^