北京市2021-2022学年九年级下学期开学考试数学试题（解析版）

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᝞¸Îᙠ5N,ÒVHḄ25YᡂW5N-OCḄ“V·5”
§bᑏ¯5NḄÕᙶ᪗Ḅ679.ூyᫀ௃c1d"D,"F;c2d5KḄᙶ᪗Wc0Ödᡈc1,0d;c3d-6<<-2.ூ᪆௃ூᑖ᪆௃c1d᪷“V·5''Ḅ°
Ú¯+ᓽᑨÛkc2d᝞+2V
5A«OGḄ“V·5”ᙠY஺WᙊZ
1WÊËḄᙊÜÝ
ÞW5Kᙠ§.y=-x+l
ßᑣᨵá+c-â+1d2=1,¯âḄ7ᓽãG⚪kc3d᝞+3V
ᵫ⚪
5Nä
5N-OG“V·5”:YNCḄV5´WᙊZ1WÊËḄQP,OP-d'Hᑗ
5NḄÕᙶ᪗ᑖæW-2ᡈ26,ᵫçᓽãG⚪kூ~௃c1d᝞+1V

18-6-5-4-3-2-èé+,Â
êᩩìḄ5ᙠAABCḄ¥í¤BCḄVî.
ᦑᡂW5A«./Ḅ''V·5''Ḅ:஺ஹF.ᦑyᫀW£)ஹF.(2)᝞+2V
5A«஺GḄ“V·5”ᙠY஺WᙊZ
1WÊËḄᙊÜÝ,-6-5-4-3-2-ÞW5Kᙠ§.)
2+1
ßKO,-஻Z+I),ᑣᨵw2+(-I)2=1,â=0ᡈ1,•••5Kᙶ᪗W(L0)ᡈ(0,1).(3)᝞+3V
ᵫ⚪
5Nä
5N-஺G“V·5”:YNCḄV5PWᙊZ1WÊËḄOP,

19OP-yHᑗ
5NḄÕᙶ᪗ᑖæW-2ᡈ-6,ᡠYêᩩìḄ5NḄÕᙶ᪗Ḅ679W-6ðkv-2.ᙊP-yHᑗ
ñᔠ⚪.ᡠY5NḄÕᙶ᪗Ḅ679W-6444-2.ூ5=௃?⚪ὃB2ᦪᔠ⚪ஹᙊḄᨵᐵÂóஹḄVî.ᳮஹ“V·5''Ḅ°MÂó
⚪ḄᐵR:ᳮ⚪
ᮣõÜᵨᡠöÂóãG⚪.