
10.B 当1≤x<5时,0≤log5x=1<log5 5=1,则[log5x]=0
当5≤x<25时,1≤log5x<log5 25=2,则[log5x]=1
当25≤x≤100时,2≤log5x≤log5 100<log5 125=3,则[log5x]=2
所以[log5 1] [log5 2] [log5 3] ... [log5 100]=4×0 20×1 76×2=172
作者:网络 来源: 2022-04-02 19:04:44 阅读:次
10.B 当1≤x5时,0≤log5x=1<log5 5=1,则[log5x]=0 当5≤x<25时,1≤log5x<log5 25=2,则[log5x]=1 当25≤x≤100时,2≤log5x≤log5 100<log5 125=3,则[log5x]=2 所
10.B 当1≤x<5时,0≤log5x=1<log5 5=1,则[log5x]=0
当5≤x<25时,1≤log5x<log5 25=2,则[log5x]=1
当25≤x≤100时,2≤log5x≤log5 100<log5 125=3,则[log5x]=2
所以[log5 1] [log5 2] [log5 3] ... [log5 100]=4×0 20×1 76×2=172