已知log2(5)=m ,log5(3)=n,求用m,n表示lg180

已知log2(5)=m ,log5(3)=n,求用m,n表示lg180 log2(5) ×log5(8)=3步骤 设log2^5=m,log5^7=n,则log2^7=? 一道高一数学题对数log2,详见补充已知log2[log1/2(log2^x)]=log3[log1/3(log3^y)]=log5[log1/5(log5^z)]=0,试比较x,y,z的大小? 2log5 10+log5 0.25= 2log5 25-3log2 64= log2(log2 16)= 已知lg2=a,lg3=b,求log3 4,log2 12 (log5(10))^3-(log5(2))^3-3log5(10)*log2(5) 1、计算log5^35+2log1/2^根号2-log5^1/50-log5^14 2、已知log3^7=a,log2^3=b,求log21^28 lg(1/4)-lg2(5) 2log5(10)+log5(0.25) 2log2(25)-3log2(64) log2(log2(16) ) 已知x=log2（5）-log2（根号5）,y=log5（3）,z=5^-1/2.则下列关系正确的是?A z 计算log2 6-log2 3,lg5+lg2,log5 3+log5 1/3,log3 5-log3 15 (log2(3))^x-(log5(3))^x>=(log2(3))^(-y)-(log5(3))^(-y) 已知log2 3=a,log5 2=b,用a,b表示log30 12 log的计算 ：log2（20）-log4（25)= log3(2)×log2（5）×log5（3）=?log2[log2(32)-log2(3÷4）+log2log的计算 ：log2（20）-log4（25)= log3(2)×log2（5）×log5（3）=?log2【log2(32)-log2(3÷4）+log2（6）】=?lgx+lg（x+15）=2 ..X 已知log2=a,log3=b,用a、b表示log5 72 (急~）1.已知log2=a,log3=b,用a、b表示log5 722.已知x=log2 5,求2^x+4^-x log2[log3[log5 125]]=?log2[log3[log5 125]]=? log2(5)*log5(8)化简 log5[log2(log9/log3)]=? (log5)^2+(log2)(log50)=?