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什么是巧算数学题例如:(1+1/2)*(1+1/4)*(1+1/6)*(1+1/8)*(1+1/3)*(1+1/5)*(1+1/7)*(1+1/9)
题目详情
什么是巧算数学题
例如:(1+1/2)*(1+1/4)*(1+1/6)*(1+1/8)*(1+1/3)*(1+1/5)*(1+1/7)*(1+1/9)
例如:(1+1/2)*(1+1/4)*(1+1/6)*(1+1/8)*(1+1/3)*(1+1/5)*(1+1/7)*(1+1/9)
▼优质解答
答案和解析
=(1+1/2)*(1+1/3)*(1+1/4)*(1+1/5)*(1+1/6)*(1+1/7)*(1+1/8)*(1+1/9)
=3/2*4/3*5/4*6/5*7/6*8/7*9/8*10/9
=5
=3/2*4/3*5/4*6/5*7/6*8/7*9/8*10/9
=5
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