若3個相異正整數的倒數和等於1,求此3數和的最小值。
3個相異正整數的倒數和等於1,只有1組解,而3數和的最小值為11。
2 | + | 3 | + | 6 | = | 11 |
若4個相異正整數的倒數和等於1,求此4數和的最小值。
4個相異正整數的倒數和等於1,只有6組解,而4數和的最小值為24。
2 | + | 4 | + | 6 | + | 12 | = | 24 |
2 | + | 3 | + | 10 | + | 15 | = | 30 |
2 | + | 4 | + | 5 | + | 20 | = | 31 |
2 | + | 3 | + | 9 | + | 18 | = | 32 |
2 | + | 3 | + | 8 | + | 24 | = | 37 |
2 | + | 3 | + | 7 | + | 42 | = | 54 |
若100之內的5個相異正整數其倒數和等於1,求此5數和的最小值。
100之內的5個相異正整數其倒數和等於1,只有42組解,而5數和的最小值為38。
3 | + | 4 | + | 5 | + | 6 | + | 20 | = | 38 |
2 | + | 4 | + | 10 | + | 12 | + | 15 | = | 43 |
2 | + | 4 | + | 9 | + | 12 | + | 18 | = | 45 |
2 | + | 5 | + | 6 | + | 12 | + | 20 | = | 45 |
2 | + | 4 | + | 8 | + | 12 | + | 24 | = | 50 |
2 | + | 5 | + | 6 | + | 10 | + | 30 | = | 53 |
2 | + | 4 | + | 7 | + | 14 | + | 28 | = | 55 |
2 | + | 4 | + | 6 | + | 21 | + | 28 | = | 61 |
2 | + | 4 | + | 6 | + | 20 | + | 30 | = | 62 |
2 | + | 4 | + | 8 | + | 10 | + | 40 | = | 64 |
2 | + | 3 | + | 12 | + | 21 | + | 28 | = | 66 |
2 | + | 4 | + | 6 | + | 18 | + | 36 | = | 66 |
2 | + | 3 | + | 12 | + | 20 | + | 30 | = | 67 |
2 | + | 4 | + | 7 | + | 12 | + | 42 | = | 67 |
2 | + | 5 | + | 6 | + | 9 | + | 45 | = | 67 |
2 | + | 3 | + | 14 | + | 15 | + | 35 | = | 69 |
2 | + | 3 | + | 12 | + | 18 | + | 36 | = | 71 |
2 | + | 3 | + | 11 | + | 22 | + | 33 | = | 71 |
2 | + | 4 | + | 6 | + | 16 | + | 48 | = | 76 |
2 | + | 3 | + | 10 | + | 24 | + | 40 | = | 79 |
2 | + | 3 | + | 12 | + | 16 | + | 48 | = | 81 |
2 | + | 4 | + | 6 | + | 15 | + | 60 | = | 87 |
2 | + | 3 | + | 9 | + | 30 | + | 45 | = | 89 |
2 | + | 3 | + | 12 | + | 15 | + | 60 | = | 92 |
2 | + | 4 | + | 5 | + | 36 | + | 45 | = | 92 |
2 | + | 3 | + | 9 | + | 27 | + | 54 | = | 95 |
2 | + | 3 | + | 10 | + | 20 | + | 60 | = | 95 |
2 | + | 4 | + | 8 | + | 9 | + | 72 | = | 95 |
2 | + | 4 | + | 5 | + | 30 | + | 60 | = | 101 |
2 | + | 4 | + | 5 | + | 28 | + | 70 | = | 109 |
2 | + | 3 | + | 9 | + | 24 | + | 72 | = | 110 |
2 | + | 4 | + | 6 | + | 14 | + | 84 | = | 110 |
2 | + | 3 | + | 8 | + | 42 | + | 56 | = | 111 |
2 | + | 3 | + | 8 | + | 40 | + | 60 | = | 113 |
2 | + | 3 | + | 12 | + | 14 | + | 84 | = | 115 |
2 | + | 3 | + | 8 | + | 36 | + | 72 | = | 121 |
2 | + | 3 | + | 10 | + | 18 | + | 90 | = | 123 |
2 | + | 3 | + | 8 | + | 33 | + | 88 | = | 134 |
2 | + | 3 | + | 9 | + | 22 | + | 99 | = | 135 |
2 | + | 4 | + | 5 | + | 25 | + | 100 | = | 136 |
2 | + | 3 | + | 8 | + | 32 | + | 96 | = | 141 |
2 | + | 3 | + | 7 | + | 78 | + | 91 | = | 181 |
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