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©2019 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
−2
x
=
−2
(2)
2
10
x
=
1
(3)
2
2
x
=
8
(4)
2
−3
x
=
−3
(5)
2
6
x
=
4
(6)
2
−4
x
=
−9
(7)
2
2
x
=
8
(8)
2
−5
x
=
−20
(9)
2
2
x
=
50
(10)
2
5
x
=
405
(11)
2
2
x
=
2
(12)
2
5
x
=
125
©2019 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
−2
x
=
−2
2
x
=
1
x
=
±
1
(2)
2
10
x
=
1
2
x
1
=
10
x
10
=
±
10
(3)
2
2
x
=
8
2
x
=
4
x
=
±
2
(4)
2
−3
x
=
−3
2
x
=
1
x
=
±
1
(5)
2
6
x
=
4
2
x
2
=
3
x
6
=
±
3
(6)
2
−4
x
=
−9
2
x
9
=
4
x
3
=
±
2
(7)
2
2
x
=
8
2
x
=
4
x
=
±
2
(8)
2
−5
x
=
−20
2
x
=
4
x
=
±
2
(9)
2
2
x
=
50
2
x
=
25
x
=
±
5
(10)
2
5
x
=
405
2
x
=
81
x
=
±
9
(11)
2
2
x
=
2
2
x
=
1
x
=
±
1
(12)
2
5
x
=
125
2
x
=
25
x
=
±
5