作业帮lg5²+2/3lg8+lg5*lg20+lg²2怎么解
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/29 07:51:58
x)I7US6467I
h g
}OvvX&H4
v6dAE`u@1SEP&!u&`9 F4LLBWc4ҀҚhZ \~qAb ( u
lg5²+2/3lg8+lg5*lg20+lg²2怎么解
lg5²+2/3lg8+lg5*lg20+lg²2怎么解
lg5²+2/3lg8+lg5*lg20+lg²2怎么解
lg5²+2/3lg8+lg5*lg20+lg²2
=lg25+lg 8^(2/3)+lg5*lg20+lg²2
=lg25+lg4+lg5*(lg10+lg2)+lg²2
=lg(25*4)+lg5+lg5*lg2+lg²2
=2+lg5+lg2(lg5+lg2)
=2+lg5+lg2*lg10
=2+lg5+lg2
=2+lg10
=3