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ๅบๆฅใใใงๅคงไธๅคซใชใฎใงใ(2)ใฎ้ไธญๅผใๆใใฆใปใใใงใ๐โโ๏ธ
Mathematics
Junior High
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๐ฉๅณ็คบใใฆๆฌฒใใใงใ๐โโ๏ธ
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4 2ๆฌก้ขๆฐy=ax๏ฝฅ๏ฝฅ๏ฝฅ๏ฝฅ๏ฝฅโ ใฎใฐใฉใใฏ็นA(4,2)ใ้ใฃใฆใใใ y ่ปธไธใซ็น B ใ AB=OB(O ใฏๅ
ๅๅ
็น)ใจใชใใใใซใจใใ
(1)Bใฎyๅบงๆจใๆฑใใใ
(2) โ OBAใฎไบ็ญๅ็ทใฎๅผใๆฑใใใ
(3) โ ไธใซ็นCใใจใ, ใฒใๅฝข OCAD ใใคใใใCใฎxๅบงๆจใtใจใใใจใ,tใๆบใใในใ2
ๆฌกๆน็จๅผใๆฑใใใ ใพใ, tใฎๅคใๆฑใใใ
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