Mathematics
Senior High
ๆฅๅใงใ๐ฆ
(2)ใใๅใใใชใใงใ
ใฉใชใใๆใใฆใใ ใใ๐โโ๏ธ
6 [2011 ๅฎ้ฝๅฎฎๅคง]
ๅบงๆจๅนณ้ขไธใฎ็ด็ทy=mx (m > 0) ใ l ใจใใใ ็น (1, 0) ใ P, ใจใ, P. ใใโใซไธใ
ใใๅ็ทใฎ่ถณใ Q1, Q ใใx่ปธใซไธใใใๅ็ทใฎ่ถณใ P2 ใจใใใ ไปฅไธๅๆงใซP(n=1
2, ......) ใใl ใซไธใใใๅ็ทใฎ่ถณใ Q Qใใx่ปธใซไธใใใๅ็ทใฎ่ถณใP+1ใจ
ใใใ
(1) PQP2ใฎ้ข็ฉSใm ใ็จใใฆ่กจใใ
8
(2)โณPQP+1 (n=1, 2, .๏ฝฅ๏ฝฅ๏ฝฅ๏ฝฅ๏ฝฅ) ใฎ้ข็ฉใ S, ใจใใใจใ, ็ดๆฐ S ใฎSใmใ
็จใใฆ่กจใใ
(3)(2)ใซใใใSใๆๅคงใซใชใ m ใจ, ใใฎใจใใฎSใฎๅคใๆฑใใใ
n=1
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