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谁会这道题?求解答 谢谢!
2个回答
展开全部
设a+b+c+d=P
则有:
(x-a-b-c)/d+(x-b-c-d)/a+(x-a-c-d)/b+(x-a-b-d)/c
=[(x-P)+d]/d+[(x-P)+a]/a+[(x-P)+b]/b+[(x-P)+c]/c
=(x-P)(1/a+1/b+1/c+1/d)+4
=4
则有:x=P=a+b+c+d
祝学习进步
则有:
(x-a-b-c)/d+(x-b-c-d)/a+(x-a-c-d)/b+(x-a-b-d)/c
=[(x-P)+d]/d+[(x-P)+a]/a+[(x-P)+b]/b+[(x-P)+c]/c
=(x-P)(1/a+1/b+1/c+1/d)+4
=4
则有:x=P=a+b+c+d
祝学习进步
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