(2)y=1/2x2x=6ใไปฃๅ
ฅใใฆ,y=1/2ร62=9ใใ,C(6,9)
(1) A (44) ใ ใใ,y=ar? ใซ z=-4,y=4ใไปฃๅ
ฅใใฆ,4=ax(-4)2, a=
14
y D
็ด็ทAC ใจy่ปธใจใฎไบค็นใEใจใใใ 2็นA(-4, 4), C(6, 9) ใ้ใใใจ
y=ax2
ๅ a=
2=2x+6
E
ใใ,็ด็ท AC ใฎๅผใๆฑใใใจ,y=1/2x+6ใ ใใ,E(0, 6)
1
(08-) A
E
โกABCD=2โณABC=2(โณABE+ โณCBE)
=21212รEBX{0-(-4)}+1/2รEBร6=2(2EB+3EB)=10EB
BARE
(4,4A
4
ใปB
IC
4
10EB=50ใใ,EB=5
ใใใใฃใฆ,็นBใฎyๅบงๆจใฏ, 6-5=1
1 ใใจใฎๅๅใใซ็ญใใชใใใ
็ญ (0, 1)