江苏省某中学2022-2023学年数学九年级上册期末检测模拟试题含解析

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2022-2023
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13BDBCூᑖ᪆௃(1)᪷,ᙊḄÿឋᓽᫀ(2)ᐜBCDs/iBDF,ᑭᵨḄឋ—,BFBDᑭᵨBC=ACᓽBD2=BCBF=AC«BFூ௃(D•••AC=BC,ᑖNACB,ACD1AB,AG=BG,...COᙊḄ!"VAB/7EF,A/CDF=/CGB=9QP,V8ᙊḄ$"%&EF஺஺Ḅᑗ)(2),:/BDF+NCDB=NCDB+NC=90஺,:./BDF=/CDB,:.KBC*KBDF,.BDBC••-9BFBDBD2=BCBF,,:BC=AC,:BD?=AC-BF.ூ*+௃,⚪.⌕ὃ12ᙊᕜ4ᳮ%ᑗ)Ḅᑨ47ឋ%Ḅᑨ47ឋ%89ᙊᕜ4ᳮ%ᑗ)Ḅᑨ47ឋ%Ḅᑨ47ឋ⚪Ḅᐵ;.20ஹ(1)>᪆(2)1,ᳮᵫ>᪆.ூ᪆௃A⚪ᑖ᪆(1)᪷CDEḄFᦪHᔠ᪷ḄᑨJK%LM=(t-3)2>0,ᵫOPQRSTᦪt,DEUᨵTᦪ᪷(2)WDEḄX᪷ᑖJYmஹn,ᵫDEḄX᪷YZᦪHᔠ᪷7FᦪḄᐵF%ᓽLm+n=t-1=0,[ᓽLH\.A⚪᪆(1)ᙠDEx2-(t-1)x+t-2=0^%M=[-(t-1)]2-4xlx(t-2)=t2-6t+9=(t-3)2>0,/.

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