若log2[log12(log2x)]=log3[log13(log3y)]=log5[log15(log5z)]=0,
若log2[log12(log2x)]=log3[log13(log3y)]=log5[log15(log5z)]=0,
log2[log1/2(log2x)]=log3[log1/3(log3y)]=0 比较XY的大小
log3[log5(log2x)]=0 求x的值
若log2(x)=log3(y)=log5(z)
(log2)和(log3)变成(log5)
已知log2 3=a,log3 5=b,用a,b来表示log15 20
已知log2 ,3=a,log3,5=b,用a,b表示log15,20
log2(a)=log3(b)=log5(c)
log2^25*log3^2倍根号2*log5^9=
log2^5*log3^2倍根号2*log5^9=
log2(3)=a,log3(7)=b.log12(56)=log3(7*8)=log3(7)+3log3(2)
已知log2 3=a,log3 5=b,用a,b表示log15 72 不要把log15 20的发上来 那个看不懂