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October Surprise 2024

Microsoft Word – ch02note.doc – Tamkang University

åøøę•øå‡½ę•øēš„å°Žå‡½ę•øē‚ŗ0怂 證꘎: d Let f(x) = c, we have c = f ( x + Ī” x ) āˆ’ f ( x ) lim = c āˆ’ c lim = 0 . dx Ī” x → 0 Ī” x Ī” x → 0 Ī” x [ č«‹ę³Øę„äøŠå¼åˆ†ęÆé€¼čæ‘0ä½†äøē‚ŗ 0] å¹¾ä½•åœ–å½¢čŖŖę˜Žåøøę•øå‡½ę•øēš„å°Žå‡½ę•ø: