→ Ricestone: 題目意思其實就是沿(3,4,-7)方向投到xy平面的斜投影矩 07/20 16:10
→ Ricestone: 陣 07/20 16:10
→ Ricestone: 所以你只要想(0,0,x)會投到什麼點就好 07/20 16:11
→ Ricestone: 最後就是以標準基底為底寫出線性變換的樣子而已 07/20 16:13
→ lanlansaysay: 不好意思 還是不太懂 07/20 18:32
→ lanlansaysay: 不太懂為何0,0,7投影會變3,4,0 07/20 18:32
→ lanlansaysay: 不好意思 還是不太懂 07/20 18:33
→ lanlansaysay: 不太懂為何0,0,7投影會變3,4,0 07/20 18:33
→ lanlansaysay: 不好意思 還是不太懂 07/20 18:33
→ lanlansaysay: 不太懂為何0,0,7投影會變3,4,0 07/20 18:33
→ lanlansaysay: 不好意思 還是不太懂 07/20 18:34
→ Ricestone: (0,0,7)+(3,4,-7)=(3,4,0) 07/20 19:19
→ Ricestone: 一般地說，(0,0,x)+(x/7)(3,4,-7) = (3x/7,4x/7,0) 07/20 19:21
→ Ricestone: 它就只是選了一個容易看出來怎麼讓它z軸變0的數字而已 07/20 19:22
→ lanlansaysay: 懂了 感謝樓上 07/21 11:05
推 joey11121: (0,0,7)+(3,4,-7)=(3,4,0) 07/28 09:32