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1/C5m-1/C6m=7/C7m,求C8m=?
题目详情
1/C5m-1/C6m=7/C7m,求C8m=?
▼优质解答
答案和解析
1/C5m-1/C6m=7/C7m
(c6m-c5m)/c5m*c6m=7/C7m
c5m(c-1)/c5m*c6m=7/c7m
(c-1)/c6m=7/c7m
(c-1)*c7m=c6m*7
c2(平方)-c=7
c2(平方)-c-7=0
(c-1/2)2(平方)-8=0
c-1/2=√8
C=√8+1/2
c8m=(√8+1/2)8m
以上解题基于c8m为c的8m次方
C8m=()
(c6m-c5m)/c5m*c6m=7/C7m
c5m(c-1)/c5m*c6m=7/c7m
(c-1)/c6m=7/c7m
(c-1)*c7m=c6m*7
c2(平方)-c=7
c2(平方)-c-7=0
(c-1/2)2(平方)-8=0
c-1/2=√8
C=√8+1/2
c8m=(√8+1/2)8m
以上解题基于c8m为c的8m次方
C8m=()
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