[DSE MATHS 2021] 7年5** + 滿分心得分享, 祈求今年M2爆機 (2)

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7 Like 11 Dislike
2021-05-17 11:22:59
M2 vector啲數計到有啲樣衰
驚炒
2021-05-17 11:23:22
應該checkAE係咪0.5AC 會發覺唔係
2021-05-17 11:23:30
清好似搞錯咗啲嘢
唔是證orthocentre
2021-05-17 11:23:36
個人覺得m1 section A 易咗, section B 最後嗰題難做
2021-05-17 11:23:43
我直接用中三水平畢氏定理ko
2021-05-17 11:24:18
唔是用|AE|=/=|BE|咩
2021-05-17 11:24:33
check 兩個vector長度唔一樣做做完
2021-05-17 11:24:49
circumcentre 唔是perpendicular bisector咩 咁證到唔是垂直 都間接證唔係circumcentre?
2021-05-17 11:25:08
輕鬆 不過運算多 寫到好煩
2021-05-17 11:25:10
我都係, 證完又驚佢亂咁扣, 計埋E嘅坐標俾佢
2021-05-17 11:27:49
會考巴會唔會整m1 solution
2021-05-17 11:28:00
我太廢了 最後果題真係唔識做
2021-05-17 11:28:09
唔會
2021-05-17 11:28:22
計緊咩
2021-05-17 11:28:22
我做法check到triangle ABC係right-angled
所以mid point係of AC就係circumcentre
之後check AE vector=\= 0.5 AC vector
2021-05-17 11:28:50
Rate of change of perimeter of rectangle
2021-05-17 11:28:59
做唔切
唔記得點in sec^3x
唔記得要拆兩次
好多運算由頭寫到尾
2021-05-17 11:29:00
Section B rate of change of permimeter 計到42
2021-05-17 11:29:15
完全無留意過有無直角
2021-05-17 11:29:20
今年m1易?
2021-05-17 11:29:53
我計到42
2021-05-17 11:30:02
個個都唔同, 金翅hihi鳥
2021-05-17 11:30:08
最後一題深,其他正常
2021-05-17 11:30:27
天滅m1
2021-05-17 11:30:50
靚數呀大佬
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