0 * LOGA B F X B >( ) 0F X G X G XA> ⇔ >LOG ( ) LOG (...
1,
0
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log
a
b
f x
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>
( ) 0
f x
g x
g x
a
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⇔
>
log
( ) log
( )
a
a
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( )
f x
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(2) Dạng 2:
thì
(3)
a
>
1
< ≠
≤ →
a
b
VN
0
1,
0
(*)
f x
g x
f x
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→ < <
> →
⇔
>
( )
( )
( )
( )
>
⇔
<
f x
*
0
1,
0
*
log
a
b
a
b
f x
b
> > → ⇔
<