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數學絲路 | 討論如何解數學問題與如何進行數學推論討論如何解數學問題與如何進行數學推論 (by 羅驥韡)
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討論如何解數學問題與如何進行數學推論 (by 羅驥韡)
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數學絲路 | 討論如何解數學問題與如何進行數學推論 | witsofmath.wordpress.com Reviews
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討論如何解數學問題與如何進行數學推論 (by 羅驥韡)
C(n,0)=1 ??? | 數學絲路
https://witsofmath.wordpress.com/2013/09/04/cn0
Skip to primary content. 比方說 3 個東西選 0 個,應該是一個東西都沒選到啊,為什麼答案等於 1 來 老師慢慢告訴你為什麼。 當我們在問 從 n 個東西中選出 k 個,有幾種選法 這種問題時,我們關心的不是 選到幾個東西 ,而是有 幾種選法. 假設我們有 { 1, 2, 3 } 三個數字,如果我們選 3 個,那麼只有 一種選法 ,也就是 { 1, 2, 3 }。 如果 3 個選 2 個,那麼有 {1,2}, {1,3}, {2,3} 3 種選法 ,所以. 如果 3 個選 1 個,那麼有 {1}, {2}, {3} 3 種選法 ,所以. 好了,重點來了 如果選 0 個呢 有幾種選法 那當然只有 什麼都不選 這 一種 選法. 有聽清楚嗎 是 一種 選法,不是 0 種選法 0 種選法是指 沒辦法選 ,連一種都沒有,但是 3 個選 0 個 有 這種選法,就是 什麼都不選。 1, 2, 3 } ,1 種選法,所以. 1,2}, {1,3}, {2,3},3 種選法,所以. 1}, {2}, {3},3 種選法,所以. This entry was posted in 組合.
羅驥韡 | 數學絲路
https://witsofmath.wordpress.com/author/pegasusroe
Skip to primary content. Skip to secondary content. 比方說 3 個東西選 0 個,應該是一個東西都沒選到啊,為什麼答案等於 1 來 老師慢慢告訴你為什麼。 當我們在問 從 n 個東西中選出 k 個,有幾種選法 這種問題時,我們關心的不是 選到幾個東西 ,而是有 幾種選法. 假設我們有 { 1, 2, 3 } 三個數字,如果我們選 3 個,那麼只有 一種選法 ,也就是 { 1, 2, 3 }。 如果 3 個選 2 個,那麼有 {1,2}, {1,3}, {2,3} 3 種選法 ,所以. 如果 3 個選 1 個,那麼有 {1}, {2}, {3} 3 種選法 ,所以. 好了,重點來了 如果選 0 個呢 有幾種選法 那當然只有 什麼都不選 這 一種 選法. 有聽清楚嗎 是 一種 選法,不是 0 種選法 0 種選法是指 沒辦法選 ,連一種都沒有,但是 3 個選 0 個 有 這種選法,就是 什麼都不選。 1, 2, 3 } ,1 種選法,所以. 1,2}, {1,3}, {2,3},3 種選法,所以. 1}, {2}, {3},3 種選法,所以.
數學絲路 | 討論如何解數學問題與如何進行數學推論 | 頁面 2
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Skip to primary content. Skip to secondary content. 到底什麼是對數中的 首數 與 尾數 呢. 當 log(x) = 3.265 時,log(x) 的 首數 就是 3.265 的 整數部份. Log(x) 的 尾數 就是 3.265 的 小數部份. 當 log(x) = -3.265. 時,log(x) 的 首數 就是在 -3.265 * 左邊的整數. Log(x) 的 尾數 就是 -4 到 -3.265 的 小數部份. 從上面的兩個例子看來, 首數 和 尾數 的意思好像不一樣,其實不然。 不管是 例一 或 例二 ,log(x) 的首數都是指位於 log(x) 本身 左邊的第一個整數. 當然,如果 log(x) 本身就是整數的話,log(x) 的首數就是它本身 ,換句話說,我們可以用 高斯符號 來表示 首數. Log(x) 的首數 = [log(x)]. Log(x) – [log(x)]. 三角形 中線長 公式 右圖中, x. 試算表網址 http:/ www.editgrid.com/user/pegasusroe/二項分配. M 為 BC 中點.
b^3+6bc^2=20, 3b^2c+2c^3=a | 數學絲路
https://witsofmath.wordpress.com/2013/09/02/problem20130902
Skip to primary content. B 3 6bc 2=20, 3b 2c 2c 3=a. 所以 b 為 20 的正因數,所以我們將所有可能性列出來. 時,c 才會有整數解 1,這時把 b, c 代回原式就可得到 a 的值。 This entry was posted in 整數. You are commenting using your WordPress.com account. ( Log Out. You are commenting using your Twitter account. ( Log Out. You are commenting using your Facebook account. ( Log Out. You are commenting using your Google account. ( Log Out. 在 WordPress.com 建立免費網站或網誌. 透過 WordPress.com 打造網站.
標準差小於等於全距的一半? | 數學絲路
https://witsofmath.wordpress.com/2013/09/05/sd
Skip to primary content. This entry was posted in 統計. You are commenting using your WordPress.com account. ( Log Out. You are commenting using your Twitter account. ( Log Out. You are commenting using your Facebook account. ( Log Out. You are commenting using your Google account. ( Log Out. 在 WordPress.com 建立免費網站或網誌. 透過 WordPress.com 打造網站.
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數學絲路 | 討論如何解數學問題與如何進行數學推論
Skip to primary content. Skip to secondary content. 比方說 3 個東西選 0 個,應該是一個東西都沒選到啊,為什麼答案等於 1 來 老師慢慢告訴你為什麼。 當我們在問 從 n 個東西中選出 k 個,有幾種選法 這種問題時,我們關心的不是 選到幾個東西 ,而是有 幾種選法. 假設我們有 { 1, 2, 3 } 三個數字,如果我們選 3 個,那麼只有 一種選法 ,也就是 { 1, 2, 3 }。 如果 3 個選 2 個,那麼有 {1,2}, {1,3}, {2,3} 3 種選法 ,所以. 如果 3 個選 1 個,那麼有 {1}, {2}, {3} 3 種選法 ,所以. 好了,重點來了 如果選 0 個呢 有幾種選法 那當然只有 什麼都不選 這 一種 選法. 有聽清楚嗎 是 一種 選法,不是 0 種選法 0 種選法是指 沒辦法選 ,連一種都沒有,但是 3 個選 0 個 有 這種選法,就是 什麼都不選。 1, 2, 3 } ,1 種選法,所以. 1,2}, {1,3}, {2,3},3 種選法,所以. 1}, {2}, {3},3 種選法,所以.
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