(lg5)^2+2lg2-(lg2)^2+log23乘log34等于?
问题描述:
(lg5)^2+2lg2-(lg2)^2+log23乘log34等于?
答
你这同是lg或log,还是本来是这题目啊~若没打错,换底公式换底算~太麻烦了,你自己做吧
答
(lg5)^2+2lg2+(lg2)^2+log2(3)log3(4)
=(lg5+lg2)^2+log2(4)
=1+2
=3