Toán Lớp 6: Tính nhanh
2^100:4^50.(1/1.2+1/2.3+1/3.4+1/4.5+….+1/99.100)
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Toán Lớp 6: Tính nhanh
2^100:4^50.(1/1.2+1/2.3+1/3.4+1/4.5+….+1/99.100)
Comments ( 2 )
=2^100:(2^2)^50.(1-1/2+1/2-1/3+1/3-1/4+1/4-1/5+…+1/99-1/100)
=2^100:2^100.(1-1/100)
=1.(100/100-1/100)
=1. 99/100
=99/100