[DSE 2019] 你地溫 數學 又溫成點呢？ [8]

所以我覺得section b唯一doable係integration個條
sec b
第一條sketching 圖都唔識畫 搵唔到area
第三條matrix 最尾個part做唔到
vector gen唔到幅圖 ->OD開始個6分都唔係人做

呢排溫final 琴晚先有少少時間睇返notes 但都夠做

p q r same plane
ap aq ar coplanar
triple scalar product=0?

I lies outside Pi
OPQR has nonzero volume
So the scalar triple product = par is non zero

妖
俾你哋搞到好想快的見到份卷

做唔到mi爆錯左

Diu autocorrect
O lies outside Pi
Triple product pqr is non zero

係喎我做多左

我計出嚟都得?

p q r coplanar
o is not on the plane
volume of tetrahedron OPQR ≠0

放棄治療的我一樣都係咁寫

差唔多計法

亂做做啱咗呢條係唔係一分

matrix part d
M^n可以成個2x2matrix by part c寫一次出黎
之後要寫佢inverse咪det(M^n)同調位補負
det(M^n)=(detM)^n
M知晒所以實計到detM
所以成個inverse寫得晒出黎
最後只係要分開有1/(-5)^n既term同constant兩舊
肯寫就有,問題係你一開始點樣令自己知道佢
work有信心寫落去
m2就係難在build up呢樣態度

我炒左vector做唔切

我計到pqr=唔知幾多pq+唔知幾多pr+唔知幾多rq
然後就咁話no p q r satisfies rhs=0

可能同 15 年差唔多
90 分先有 1 粒星

寫佢地個volume=/=0
p^2+q^2+r^2/=/0

出到咁淺真係弱智