Mathematics
Senior High
数１の問題です。2枚目の解説は途中から理解できなくなりました
不等式 3x-2<7 の解は、必ず2xくのになっている。 αの値の範囲を求めよ。
H
5 a≥6
解き方> 3x-2<7 3x <7+2 3x<9x<3
2x<a x</
よって, 3sq
となればよいから. a≧6
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