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©2018 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
10
x
=
5
(2)
2
4
x
=
1
(3)
2
4
x
=
1
(4)
2
5
x
=
125
(5)
2
2
x
=
98
(6)
2
3
x
=
1
(7)
2
−3
x
=
−243
(8)
2
−2
x
=
−7
(9)
2
3
x
=
7
(10)
2
−2
x
=
−200
(11)
2
−3
x
=
−3
(12)
2
−3
x
=
−1
©2018 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
10
x
=
5
2
x
1
=
2
x
2
=
±
2
(2)
2
4
x
=
1
2
x
1
=
4
x
1
=
±
2
(3)
2
4
x
=
1
2
x
1
=
4
x
1
=
±
2
(4)
2
5
x
=
125
2
x
=
25
x
=
±
5
(5)
2
2
x
=
98
2
x
=
49
x
=
±
7
(6)
2
3
x
=
1
2
x
1
=
3
x
3
=
±
3
(7)
2
−3
x
=
−243
2
x
=
81
x
=
±
9
(8)
2
−2
x
=
−7
2
x
7
=
2
x
14
=
±
2
(9)
2
3
x
=
7
2
x
7
=
3
x
21
=
±
3
(10)
2
−2
x
=
−200
2
x
=
100
x
=
±
10
(11)
2
−3
x
=
−3
2
x
=
1
x
=
±
1
(12)
2
−3
x
=
−1
2
x
1
=
3
x
3
=
±
3