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xulythanhthanh
2 năm trước
Bài tập 2: So sánh các số: a, 36 và 63 Ta có: 36 = 33.33 63 = 23.33  36 > 63 b, 4100 và 2200 Ta có: 4100 = (22)100 = 22.100 = 2200  4100 = 2200 Bài tập 3: Tìm số tự nhiên n, biết: a,  32 = 2n.4  25 = 2n.22  25 = 2n + 2  5 = n + 2  n = 3 b,  5n = 625:5 = 125 = 53  n = 3 c, 27n:3n = 32  9n = 9  n = 1
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