a, x-10/1994+x-8/1996+x-6/1998+x-4/2000+x-2/2002=x-2002/2+x-2000/4+x-1998/6+x-1996/8+x-1994/10

Câu hỏi :

a, 
x-101994+x-81996+x-61998+x-42000+x-22002=x-20022+x-20004+x-19986+x-19968+x-199410

* Đáp án

* Hướng dẫn giải

a, Ta có
x-101994+x-81996+x-61998+x-42000+x-22002=x-20022+x-20004+x-19986+x-19968+x-199410x-101994-1+x-81996-1+x-61998-1+x-42000-1+x-22002-1=x-20022-1+x-20004-1+x-19986-1+x-19968-1+x-199410-1x-20141994+x-20141996+x-20141998+x-20142000+x-20142002=x-20142+x-20144+x-20146+x-20148+x-201410x-201411994+11996+11998+12000+12002-12-14-16-18-110x-2014=0x=2014

Vậy phương trình đã cho có nghiệm là x = 2014.

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