loga(2)>logb(2),
由换底公式,1/log2(a)>1/log2(b),(*)
1)若 log2(a)>0,log2(b)1>b>0;
2)若 log2(a)>0,log2(b)>0,则由(*)得 log2(a)a>1;
3)若 log2(a)
loga(2)>logb(2),
由换底公式,1/log2(a)>1/log2(b),(*)
1)若 log2(a)>0,log2(b)1>b>0;
2)若 log2(a)>0,log2(b)>0,则由(*)得 log2(a)a>1;
3)若 log2(a)