log2 3等于多少?2是下标

常用对数表:(10为底)
lg1 = 0
lg2 = 0.30102999566398119521373889472449
lg3 = 0.47712125471966243729502790325512
lg4 = 0.60205999132796239042747778944899
lg5 = 0.69897000433601880478626110527551
lg6 = 0.77815125038364363250876679797961
lg7 = 0.84509804001425683071221625859264
lg8 = 0.90308998699194358564121668417348
lg9 = 0.95424250943932487459005580651023
lg10 = 1
lg11 = 1.041392685158225040750199971243
lg12 = 1.0791812460476248277225056927041
lg13 = 1.1139433523068367692065051579423
lg14 = 1.1461280356782380259259551533171
lg15 = 1.1760912590556812420812890085306
lg16 = 1.204119982655924780854955578898
lg17 = 1.2304489213782739285401698943283
lg18 = 1.2552725051033060698037947012347
lg19 = 1.2787536009528289615363334757569
lg20 = 1.3010299956639811952137388947245

这只能用计算器了
log(2) 3 = 1.5849625007211561814537389439478