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`2^[x].2^[x+1].2^[x+2]=1000 ... 0 : 5^18 (18` chữ số `0)`

`=>2^[x+x+1+x+2]=10^18 :5^18`

`=>2^[3x+3]=(10:5)^18`

`=>2^[3x+3]=2^18`

`=>3x+3=18`

`=>3x=18-3`

`=>3x=15`

`=>x=15:3`

`=>x=5`

Vậy `x=5`