2020-2021学年河北省邯郸九年级（上）第二次月考数学试卷（附答案详解）

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2020-2021
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8ூ᪆௃᪷#⚪_'y=(100-x)(50-x).ᦑ⌱C.᪷#³Ḅ´ᳮ3.(⚪ὃ-.ᑡFGvᦪ᪆=ᳮ⚪_⚪Ḅᐵ:.8.ூᫀ௃Dூ᪆௃y=-2(x-I)2,-2<0,Fhxljy½xḄ¾ᜧÀÂÕ••qᱥsÄ=-2(%-1)2ḄÆÇᨵlJ4(D1/),8(1/2)C(2,y),3•••Ä2>{>y஺ᦑ⌱D.᪷#FGvᦪḄឋ}ᑨaÄ2,Ä3ḄᜧÃᐵgËÀ(⚪.(⚪ὃ-FGvᦪÆÇJḄᙶ᪗ᱯ&(⚪Ḅᐵ:ÎÏ⚪_ᑭᵨFGvᦪḄឋ}.9.ூᫀ௃Cூ᪆௃4a=1>0,ᑣqᱥsḄÒÓAᔣᔣÇᡠA⌱⚗mØᔠ⚪_oAqᱥsḄtusx==1,ᡠ8⌱⚗mØᔠ⚪_o2X1C.<{qᱥsy=/—2x+cytÛJ(0,-3),Ijc=-3,ᡠy=(x—D4,hÝ=1jyḄᨬÃZ{-4,ᡠC⌱⚗Øᔠ⚪_oDAB/-2x-3=0'/=-1,x=3,ᑣqᱥsxtḄÛJ{(-1.0),(3,0),2ᡠ஺⌱⚗mØᔠ⚪_.ᦑ⌱C.᪷#FGvᦪḄឋ}A⌱⚗àáᑨa;᪷#qᱥsḄtAB8⌱⚗àáᑨaᑭᵨãAä'ᑮqᱥsḄ⚔J=ᯠ\᪷#FGvᦪḄឋ}C⌱⚗àáᑨao᪷#qᱥsxtḄÛJå⚪஺⌱⚗àáᑨa.(⚪ὃ-.qᱥsxtḄÛJO3FGvᦪÄ=஺/+æ+஺(çè஺éᦪ஺ᱏ0)xtḄÛJᙶ᪗å⚪ᓄ{ᐵxḄDᐗFGAB.ëὃ-.FGvᦪḄឋ}.10.ூᫀ௃Cூ᪆௃x=3.24jaM+í+c=—0.02ox=3.25jax2+bx+c=0.03,FᐵxḄABa/+bx+c=0(aH0)ḄDlxḄð3.24

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