引用第5377樓matthew93manutd於2010-05-04 13:01發表的“”:
where are the answers?
ot: chem mc Q43 ?
1 -3x^2 sin(x^3+1) , -3x^3 sin(x^3+1) + cos(x^3+1)
2 畫圖
3 I=-9/4 , I=A2-A1
4 k>=4/3
5 n=5,coef. of x ³=640
6 x+y-4=0
7 tanθ=7
8 MI , 3(M+k^2+2)
9 r=2,θ=兀/6 ; 2兀n+5兀/6 or 2兀n-7兀/6 [呢個可能唔洗寫]
10 12x-y-16=0
11 x>=3/2
12 OA.OB=15 , OB=5i+5j or i+7j
13 兀/6 , 3√(3)/4 , not max,sub入去唔等於0
14 r=2/7 , OE=9/7a+c , opp.angles supp.
15 10,2 , x=0 or y=-3/4x
16 756π , h=3 , -5/11