对数的简单求值:lg²5+1g21g5+1g20
问题描述:
对数的简单求值:lg²5+1g21g5+1g20
如题,答案别太简略就行了,
新手分少,
答
lg²5+1g21g5+1g20
=lg5(lg5+1g2)+1g2+lg10
=lg5+lg2+1
=2