AB 係diameter
OM bisect EB
EM 係tangent to 個circle
prove 角DOM=角MOB
呢個係 part a 第一題
已經唔識做.....
呢條差b part
前面a part 搵 axis of symmetry
之後搵返條 方程式
b part
P(-4,0) R(2,0) (一開始係比 (x+1)^2-9)
If Q is a moving point on the graph and below x axis
S is a point above x axis
PQRS is a parallelogram
A(x) is the area of PQRS
1.find the domain of PQRS
2.find the maximum area of PQRS |