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数学题(+1)x(+2)x...x(+202)x(+203)x(-1/203)x(-1/202)x...x(-1/2)x(-1)
题目详情
数学题(+1)x(+2)x...x(+202)x(+203)x(-1/203)x(-1/202)x...x(-1/2)x(-1)
▼优质解答
答案和解析
1*2*3*4*5*.202*203*(-1/203)*(-1/202)*...*(-1/2)*(-1)
=1*(-1)*2*(-1/2)*.*203*(-1/203)
=-1*(-1)*.*(-1)
=(-1)^203
=-1
=1*(-1)*2*(-1/2)*.*203*(-1/203)
=-1*(-1)*.*(-1)
=(-1)^203
=-1
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