如题所述
1/1*3+1/2*4+1/3*5+1/4*6+1/5*7......1/98*100+1/99*101
=(1-1/3+1/2-1/4+1/3-1/5+1/4-1/6+1/5-1/7+……+1/98-1/100+1/99-1/101)÷2
=(1+1/2-1/100-1/101)÷2
=15049/10100÷2
=15049/20200
6分之1+12分之1+24分之1+48分之1+96分之1+192分之1
=1/6×(1+1/2+1/4+1/8+1/16+1/32)
=1/6×(1-1/32)
=1/6-1/192
=31/192
1/2+1/(2+4)+1/(2+4+6)+…1/(2+4+6+…+200)
=1/(1×2)+1/(2×3)+1/(3×4)+1/(100×101)
=1-1/2+1/2-1/3+1/3-1/4+……+1/100-1/101)
=1-1/101
=100/101
=(1-1/3+1/2-1/4+1/3-1/5+1/4-1/6+1/5-1/7+……+1/98-1/100+1/99-1/101)÷2
=(1+1/2-1/100-1/101)÷2
=15049/10100÷2
=15049/20200
6分之1+12分之1+24分之1+48分之1+96分之1+192分之1
=1/6×(1+1/2+1/4+1/8+1/16+1/32)
=1/6×(1-1/32)
=1/6-1/192
=31/192
1/2+1/(2+4)+1/(2+4+6)+…1/(2+4+6+…+200)
=1/(1×2)+1/(2×3)+1/(3×4)+1/(100×101)
=1-1/2+1/2-1/3+1/3-1/4+……+1/100-1/101)
=1-1/101
=100/101
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第1个回答 2021-01-03