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斜率

出自維基百科,自由嘅百科全書

斜率係一種比值,用嚟表示傾斜嘅程度。計法係除以

一條直線嘅斜率喺任何一點都係一樣。

計曲線斜率要用到導數,係微積分入面嘅一種算法

對一個函數,如果要搵兩點譬如 嘅斜率:

如果要搵曲線中某點 時嘅斜率,用上面條式會變咗不定式),所以要用極限嚟計:

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