lg2的平方 lg2乘以lg50 lg25

(lg5)^+lg2xlg50=lg5^+lg2x(lg2+2lg5)=lg5^+lg2^+2lg2lg5=(lg5+lg2)^2=(lg10)^2=1

lg25+lg2*lg50+(lg2)＾2=2*lg5+lg2*(lg50+lg2)=2*lg5+lg2*lg100=2*lg5+2*lg2=2*(lg5+lg2)=2*lg10=2

lg25+lg2*lg50+(lg2)＾2=2*lg5+lg2*(lg50+lg2)=2*lg5+lg2*lg100=2*lg5+2*lg2=2*(lg5+lg2)=2*lg10=2

lg5²+lg2*lg50+(lg2)²=2lg5+lg2(lg50+lg2)=2lg5+lg2*2=2(lg5+lg2)=2*1=2无他,两公式lgn^a=algn(a是幂)lg

lg5*lg5+lg2*lg50=lg5*lg5+lg2*(lg5+lg10)=lg5*(lg5+lg2)+lg2*lg10=lg5*lg10+lg2*lg10=lg10*(lg2+lg5)=lg10

原式=lg2(lg2+lg50)+2lg5=lg2(lg2+lg5+lg10)+2lg5=lg2(1+1)+2lg5=2(lg2+lg5)=2

(lg5)^2+lg2×lg50=(lg5)^2+lg2×[lg2+lg(5^2)]=(lg5)^2+(lg2)^2+2×lg5×lg2=(lg5+lg2)=lg(5×2)=1

错了是=(lg5)²+(lg50)×lg2=(lg5)²+(lg5+1)×lg2=(lg5)²+lg5×lg2+lg2=lg5×(lg5+lg2)+lg2=lg5×1+l

(lg5)^2+(lg2)*(lg50)=(lg5)^2+(lg2)*[lg(2*5^2)]=(lg5)^2+(lg2)*[lg2+(lg5)^2]=(lg5)^2+(lg2)*[lg2+2*(lg5

(lg5)的平方+lg2*lg50=(lg5)的平方+lg2*(lg5+lg10)=(lg5)的平方+lg2*lg5+lg2=lg5(lg5+lg2)+lg2=lg5+lg2=lg10=1祝你好运

lg2+lg2=2lg2,lg50+lg25=(lg5*10)+lg5*5=lg5+1+2lg5=1+3lg5

lg(5)^2+lg2*lg50=lg5*lg5+lg2(lg2+2lg5)=lg5*lg5+lg2*lg2+lg2*lg5+lg2*lg5=lg5(lg5+lg2)+lg2(lg2+lg5)=lg5

原式=lg2(lg2+lg50)+2lg5=lg2(lg2+lg5+lg10)+2lg5=lg2(1+1)+2lg5=2(lg2+lg5)=2

(lg2)^2+lg2*lg50+lg25=(lg2)^2+lg2*(lg5+1)+2lg5=(lg2)^2+lg2*lg5+(lg2+lg5)+lg5=(lg2)^2+lg2*lg5+1+lg5=l

lg2(lg2+lg5)+lg(5×10)=lg2×1+lg5+lg10=lg2+lg5+1=1+1=2

原式=2lg5+2lg2+lg2*(lg100-lg2)+(lg2)^2=2(lg5+lg2)+lg2*(2-lg2)+(lg2)^2=2+2lg2-(lg2)^2+(lg2)^2=2+2lg2

(lg5)²+lg2×lg50=(lg5)²+lg2×(lg5+lg10)=lg5×(lg5+lg2)+lg2=lg5+lg2=lg10=1

2lg25+lg2*lg50+(lg2)2=4lg5+lg2(1+lg5)+(lg2)2=4lg5+lg2+lg2*lg5+lg2*lg2=4lg5+lg2+lg2(lg2+lg5)=4lg5+2lg

(lg5)^2+lg2*lg50=(lg5)^2+lg2*(lg10+lg5)=(lg5)^2+lg2*lg5+lg2=lg5(lg5+lg2)+lg2=lg5+lg2=lg(2*5)=1

lg²5+lg2×lg50=lg²5+lg2×lg(5²×2)=lg²5+lg2×(2lg5+lg2)=lg²5+2lg5lg2+lg²2=