fyqt.net
ǰλãҳ >> lg50 >>

lg50

2

=Lg5һ(Lg10ʮLg5) =Lg5һLg5һ1 =0һ1 =һ1

(lg5²+lg2*lg50 =(lg5)²+lg2(lg5+lg10) =(lg5)²+lg2lg5+lg2lg10 =lg5(lg5+lg2)+lg2 =lg5lg10+lg2 =lg5+lg2 =lg10 =1 Ϊ ,[];в֮,ָ,һ! ϣһȷ!...

! 1+lg50/lg2 1=lg2/lg2,ô 1+lg50/lg2 =lg2/lg2+lg50/lg2 =(lg2+lg50)/lg2 =(lg(2*50))/lg2 =lg100/lg2 =2/lg2 лл!

50Log

lg50֮1ڶ٣ lg(1/50) =lg0.02 =-2+lg2 =-2+0.3010 =-1.6990

lg2*lg50=lg2*lg10+lg5=lg2*1+lg5=lg2+1

(lg2)³+(lg5)³+3lg2lg5 =(lg2+lg5)[(lg2)²-lg2lg5+(lg5)²]+3lg2lg5 =(lg2)²-lg2lg5+(lg5)²+3lg2lg5 =(lg2)²+2lg2lg5+(lg5)² =(lg2+lg5)² =1

⣬lg5lg20-lg2lg50-lg25=lg52lg2+lg5-lg22lg5+lg2-2lg5=lg25-lg22-2lg5=lg5-lg2-2lg5=-lg2+lg5=-1ʴΪ-1

վҳ | վͼ
All rights reserved Powered by www.fyqt.net
copyright ©right 2010-2021
磬ַϵͷzhit325@qq.com