fill in the blanks 2/9+2/9+2/9+2/9 =4x _____
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Step-by-step explanation:
Given series is 2, 9, 28,?, 126, 217, 344
2 + 7 = 9, 9 + 19 = 28, 28 + (19 + 18) = 65, 65 + (37 + 24) = 126, 126 + (61 + 30) = 217, 217+(91+36) = 344
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