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指數與對數
二乙6號鍾漢森
指導老師:陳永富 - Coggle Diagram
指數與對數
二乙6號鍾漢森
指導老師:陳永富
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對數
四、a > 0 且a ≠ 1,且 x > 0
- 0 loga x > → (a −1)(x −1) > 0 → (a >1且 x > 0 )或(0 < a <1且0 < x <1)
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- 0 loga x < → (a −1)(x −1) < 0 → (a >1且0 < x <1)或(0 < a <1或 x >1) :
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三、r > 0 且 s > 0
- a >1時,r > s → r s a a log > log
- 0 < a <1時,r > s → r s a a log < log
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