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1×1 问题详解
2022-08-06 03:36:00 【小天狼星_布莱克】
证明 1 × 1 = 1
原式 =(2-1)×(2-1)
= 2² + 1² - (2×1)×2
= 4 + 1 - 4
设 x = 4 , y = 1 , z = 4;
4 + 1 - 4 = x + y - z ;
∵ x=4 , y=1 , z=4
又∵ x - z =0
∴ 1 × 1 = x + y - z = y
∵ y = 1
∴ 1 × 1 = 1
结论:1 × 1 = 1。
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