Soalan 9
Selesaikan persamaan,
log
2
4
x
=
1
−
log
4
x
Penyelesaian:
log
2
4
x
=
1
−
log
4
x
log
2
4
x
=
1
−
log
2
x
log
2
4
log
2
4
x
=
1
−
log
2
x
2
2
log
2
4
x
=
2
−
log
2
x
log
2
16
x
2
=
log
2
4
−
log
2
x
log
2
16
x
2
=
log
2
4
x
16
x
2
=
4
x
x
3
=
4
16
=
1
4
x
=
(
1
4
)
1
3
=
0.62996
Soalan 10
Selesaikan persamaan,
log
4
x
=
25
log
x
4
Penyelesaian:
log
4
x
=
25
log
x
4
1
log
x
4
=
25
log
x
4
1
25
=
(
log
x
4
)
2
log
x
4
=
±
1
5
log
x
4
=
1
5
or
log
x
4
=
−
1
5
4
=
x
1
5
4
=
x
−
1
5
x
=
4
5
4
=
1
x
1
5
x
=
1024
x
1
5
=
1
4
x
=
1
1024
Soalan 11
Selesaikan persamaan,
2
log
x
5
+
log
5
x
=
lg
1000
Penyelesaian:
2
log
x
5
+
log
5
x
=
lg
1000
2.
1
log
5
x
+
log
5
x
=
3
×
(
log
5
x
)
→
2
+
(
log
5
x
)
2
=
3
log
5
x
(
log
5
x
)
2
−
3
log
5
x
+
2
=
0
(
log
5
x
−
2
)
(
log
5
x
−
1
)
=
0
log
5
x
=
2
or
log
5
x
=
1
x
=
5
2
x
=
5
x
=
25