知log2 = 0.3010﹐log3 = 0.4771﹐log7 = 0.8451﹐求下列各對數. 的近似值:. (1)log4 = ______﹒ (2)log5 = ______﹒ (3)log6 = ______﹒ (4)log8 = ______﹒
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