An inequality is an inequality that holds true regardless of the values of the letters included in the inequality. Absolute inequalities include x 2 + 3 x + 4>0 and x 2 + y 2 + 2>0. Well-known absolute inequalities include the relationship between the arithmetic mean ( a + b )/2, geometric mean, and harmonic mean 2 ab /( a + b ) when a > 0, b > 0, arithmetic mean ≧ geometric mean ≧ harmonic mean (the equation holds only when a = b ), and Schwarz's inequality. There are conditional inequalities for absolute inequalities. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
不等式に含まれる文字が,どのような値をとっても成り立つような不等式をいう。 x2+3x+4>0 ,x2+y2+2>0 などは絶対不等式である。よく知られている絶対不等式に,a>0 ,b>0 のときの,算術平均 (a+b)/2 ,幾何平均 ,調和平均 2ab/(a+b) の間の関係式,算術平均 ≧ 幾何平均 ≧ 調和平均 (等式が成り立つのは a=b に限る) やシュワルツの不等式がある。絶対不等式に対して条件つき不等式がある。
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