若(log2(3))^x-(log5(3))^x>=(log2(3))^(-y)-(log5(3))^(-y) 则 A.x+y>0 B.x+y=0 D.

(log2(3))^x-(log5(3))^x>=(log2(3))^(-y)-(log5(3))^(-y) 若(log2(3))^x-(log5(3))^x>=(log2(3))^(-y)-(log5(3))^(-y) 则 A.x+y>0 B.x+y=0 D.   求(log2)^3+(log5)^3+log5×log8的值. log2(5) ×log5(8)=3步骤 求x的值 log4^x=-2/3 log2^(log5^x)=0log4^x=-2/3 log2^(log5^x)=0 分开的 (log3^4+log5^2)(log2^9+log2^根号3) (log5(10))^3-(log5(2))^3-3log5(10)*log2(5) lg(1/4)-lg2(5) 2log5(10)+log5(0.25) 2log2(25)-3log2(64) log2(log2(16) ) 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 计算log2 6-log2 3,lg5+lg2,log5 3+log5 1/3,log3 5-log3 15 log2(log5 x)=-1 如果log5[log3(log2 x)]=0,那么x^(1/3)等于 设log2(5)=x,log5(3)=y,试用x,y表示log24(20) 若log2(x)=log3(y)=log5(z) （1）2log5*10+log5*0.25(2)log2(log2*16)(3)lg12.5-lg5/8+lg0.5第三题：y=√（x²+3x+2）+log2*3x的定义域是? 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? 求(log2)^3+(log5)^3+log5×log8的值.(以10为底) 2^(1/2log2 3)+(1/25)^log5 3=