lg的真数为2等于0.3010;lg的真数为3等于0.4771;求lg的真数根号下1.8

问题描述:

lg的真数为2等于0.3010;lg的真数为3等于0.4771;求lg的真数根号下1.8

∵lg2=0.3010,lg3=0.4771∴lg√1.8=½lg1.8=½lg﹙0.1×2×3²﹚=½﹙lg0.1+lg2+lg3²﹚=½﹙lg0.1+lg2+2lg3﹚=½×﹙-1+0.3010+2×0.4771﹚=½×0.2552=0.1276...