帮忙一下,数学题
1个回答
展开全部
一、2※(6※3)= 2※(6+3/6×3)=2※7.5=2+7.5/2×7.5=30.125
1/4※1/5=(1/4)+(1/5)/(1/4)×(1/5)=41/100=0.41
二、
1/2×3=1/2-1/3
1/3×4=1/3-1/4
1/4×5=1/4-1/5
1/5×6=1/5-1/6
1/6×7=1/6-1/7
1/7×8=1/7-1/8
左边相加得出
1/2×3+1/3×4+1/4×5+1/5×6+1/6×7+1/7×8=1/2-1/8=3/8
1/4※1/5=(1/4)+(1/5)/(1/4)×(1/5)=41/100=0.41
二、
1/2×3=1/2-1/3
1/3×4=1/3-1/4
1/4×5=1/4-1/5
1/5×6=1/5-1/6
1/6×7=1/6-1/7
1/7×8=1/7-1/8
左边相加得出
1/2×3+1/3×4+1/4×5+1/5×6+1/6×7+1/7×8=1/2-1/8=3/8
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