χͺ(4)Μ1D(4)Μπ
log
x
2
y
=
log
2
log
x
y
′
=
log
2
(
1
log
x
)
′
=
log
2
{
−
1
(
log
x
)
2
}
(
log
x
)
′
=
−
log
2
x
(
log
x
)
2
Λ
ΜβθΜπ
Λ
qg1
,
qg2
,
qg3
Λ
πΰ1
Λ
χͺ(4)ΜTOPΦίι
