U^-14/U^10(U TO 附十四,U TO 十)(- -中文太烂了,难表达)反正答案是1/U^12,我想知道是为什么?S^2 - 12s + 40这题是prime吗?75 - 20r + r^2(直接给答案,如果能解释就更好了)75 - 27u + u^2
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U^-14/U^10(U TO 附十四,U TO 十)(- -中文太烂了,难表达)反正答案是1/U^12,我想知道是为什么?S^2 - 12s + 40这题是prime吗?75 - 20r + r^2(直接给答案,如果能解释就更好了)75 - 27u + u^2
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{u+U=10,3u-2U=5
已知4U-u=6U+2u=14求U,u的值
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