E Y=A*X2‚ÌŒ`‚Ì•ú•¨ü

E Ô A=-1/4

E Â A=-1/2

E —Î A=-1

E Ž‡ A=1

E ˆÃ‰© A=1/2

E ŠDF A=1/4

E X:‰¡Ž²AY:cŽ²Ac‰¡“™–Ú·A–Ú·‚Ì’PˆÊ‚P

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