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5/1x4-11/4x7+17/7x10-.+41/19x22
题目详情
5/1x4-11/4x7+17/7x10-.+41/19x22
▼优质解答
答案和解析
5/(1×4)-11/(4×7)+17/(7×10)-.+41/(19×22)
=(1/1+1/4)-(1/4+1/7)+(1/7+1/10)-.+(1/19+1/22)
=1+1/22
=23/22.
=(1/1+1/4)-(1/4+1/7)+(1/7+1/10)-.+(1/19+1/22)
=1+1/22
=23/22.
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