lg3/5=a+b-1
lg1.8=a+2b-1详细点lg3/5=lg6/10=lg6-lg10=lg2^3-lg10=a+b-11g1.8=1g8-1g10=2b-11g1.8=1g8-1g10=2b-1看不懂1g1.8=1g18-1g10=lg2^9-1=lg2+lg3²-1=a+2lg3-1=a?+2b-1不懂请继续追问