［文字サイズの変更］
▼
▲
©2026 数学クラブ http://sugaku.club/
月 日（ ）
● 次の等式を[ ]内の変数について解きなさい．
[181-20]
(1)
1
[
b
]
a
=
−
b
2
(2)
4
[
r
]
p
=
q
r
5
(3)
1
2
[
r
]
p
=
q
r
2
(4)
1
[
c
]
a
=
b
c
3
(5)
1
[
q
]
p
=
q
4
(6)
2
2
[
b
]
a
=
b
c
3
(7)
1
3
[
b
]
a
=
b
c
2
(8)
1
2
[
b
]
a
=
b
c
3
(9)
1
[
y
]
x
=
y
z
3
(10)
1
[
c
]
a
=
−
b
c
2
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
1
[
b
]
a
=
−
b
2
1
−
b
2
=
a
b
=
−2
a
(2)
4
[
r
]
p
=
q
r
5
4
q
r
5
=
p
r
5
p
=
4
q
(3)
1
2
[
r
]
p
=
q
r
2
1
2
q
r
2
=
p
r
2
p
=
2
q
(4)
1
[
c
]
a
=
b
c
3
1
b
c
3
=
a
c
3
a
=
b
(5)
1
[
q
]
p
=
q
4
1
q
4
=
p
q
=
4
p
(6)
2
2
[
b
]
a
=
b
c
3
2
2
b
c
3
=
a
b
3
a
=
2
2
c
(7)
1
3
[
b
]
a
=
b
c
2
1
3
b
c
2
=
a
b
2
a
=
3
c
(8)
1
2
[
b
]
a
=
b
c
3
1
2
b
c
3
=
a
b
3
a
=
2
c
(9)
1
[
y
]
x
=
y
z
3
1
y
z
3
=
x
y
3
x
=
z
(10)
1
[
c
]
a
=
−
b
c
2
1
−
b
c
2
=
a
c
2
a
=
−
b