考虑方程 (43) x = (y3) 8其中 x 和 y 未知。可能的解决方案的数量是________。
(一) 3
(乙) 4
(三) 5
(四) 6答案: (C)
解释:
3 + 4x = 3 + 8y where 0 <= y = 5 (because the number represented in base x is 34)
x = 2y and 0 <= y <= 7
The following are possible solutions
y = 3, 4, 5, 6, 7
x = 6, 8, 10, 12, 14
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