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©2024 数学クラブ http://sugaku.club/
月 日（ ）
● 次の方程式を解きなさい
[210-00]
(1)
2
x
=
1
(2)
2
−5
x
=
−20
(3)
2
−2
x
=
−200
(4)
2
−5
x
=
−320
(5)
2
2
x
=
128
(6)
2
−5
x
=
−80
(7)
2
−2
x
=
−50
(8)
2
5
x
=
5
(9)
2
−2
x
=
−50
(10)
2
−2
x
=
−18
(11)
2
−7
x
=
−6
(12)
2
5
x
=
245
©2024 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
x
=
1
x
=
±
1
(2)
2
−5
x
=
−20
2
x
=
4
x
=
±
2
(3)
2
−2
x
=
−200
2
x
=
100
x
=
±
10
(4)
2
−5
x
=
−320
2
x
=
64
x
=
±
8
(5)
2
2
x
=
128
2
x
=
64
x
=
±
8
(6)
2
−5
x
=
−80
2
x
=
16
x
=
±
4
(7)
2
−2
x
=
−50
2
x
=
25
x
=
±
5
(8)
2
5
x
=
5
2
x
=
1
x
=
±
1
(9)
2
−2
x
=
−50
2
x
=
25
x
=
±
5
(10)
2
−2
x
=
−18
2
x
=
9
x
=
±
3
(11)
2
−7
x
=
−6
2
x
6
=
7
x
42
=
±
7
(12)
2
5
x
=
245
2
x
=
49
x
=
±
7