2021-2022学年宁夏宁中考数学对点突破模拟试卷含解析及点睛

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20(2)5Ḅ⚣᳛Q360஺ᓽgB,ᫀ(2)᪛y$6ᓽgᡠᨵᐰᑡᩭzB,ា¢£uὅ¤Ḅᭆ᳛ூD௃30(1)¦§Ḅᦪe17+0.17=100(),ᑣ஺=—=0.3,6=100x0.45=45().100ᦑᫀe0.3,45(2)360°x0.3=108°.ᡧys$u8®ᡧyḄᙊ¯)e108஺.(3)°±²³Ḅᵬஹµ¶·¸eAஹB,¹᜜¤¶·¸eCஹD,᪛y$,»¼21•.•ᐳᨵ12¾9gdḄᵬஹµ¤¿°¶ÀÁ⌱uḄᨵ2¾rᵬஹµ¤¿°¶ÀÁ⌱uḄᭆ᳛e±=.126ூUV௃⚪ὃḄZᩩys$Âᡧys$ḄÃᔠÅᵨÆÇs$c°Ḅs$u,ᑮÈ⌕ḄÉÊZËÌ⚪Ḅᐵ.ᩩys$dÍÎᙢ⊤ÑÒ⚗ÔḄᦪ&ᡧys$w"Õ᧜ᑖᓰØḄÙᑖAᜧ.26ஹ(1)2ஹ45ஹ20(2)72(3)-6ூ᪆௃ᑖ᪆(D᪷&A9¦ᦪᐸÙᑖAB,ᦪᦪQD9¦ÙᑖAg,aḄY/ᵨBஹC9¦ᦪ◀Qᦪg,bஹcḄY(2)ᵨ360஺QC9¦ÙᑖAg,(3)᪛Û$ᵫᭆ᳛ÝKᓽg,ᫀ.D(1)¦§Ḅᦪe12+30%=40188/.a=40x5%=2,b=±xl00=45,c=—xl00=20,4040(2)ᡧys$u⊤ÑC9¦Ḅᡧyᡠ®Ḅᙊ¯)ḄÞᦪe360°x20%=72°,(3)᪛Û$᝞$ᡠÑ

21ᵬᵬᵬᐳᨵ121Ḅkl⌱nḄopqrាtMᵬஹvḄklᨵ221ᦑP(⌱nḄopqrាtMᵬஹv)897x⚪y⌕ὃ=>ᑡ⊤WD᪛}~WᡧC~ஹᩩC~Ḅᵨ⌕NOPQ.27ஹ(1)y=2x2-4x-2=2(x-l)2-4,⚔8ᙶ᪗(1,-4)(2)m=±1(3)জba>0y2>yi,ঝbaVOyi>y2.ூ᪆௃⚪ᑖ᪆7(1)a=2,b=4ᐭy=o?—2ᓽ1Xxᦪ~Ḅ⚔8ᙶ᪗,(2)ᵫ⚪(m,t)(-m,-t)ᐭ(1)nᡠ6ᦪḄ᪆ᓽ16mḄ,(3)8(1,0)ᐭy=?-a-216b=a-2,ᵫx16ᱥ+Ḅ¡¢-+7x=-£=2=¤2=2a2ala2a¥ᑖa>0a<0o¦§¨ᑖ©ª«ᓽ1yiyḄᜧᐵ®>.2⚪᪆7(1)a=2,b=4ᐭy=or2-fee-267y-2x2-4x-2=2(x-l)2-4,,xᦪḄ~Ḅ⚔8ᙶ᪗(1,-4)(2)ᵫ⚪(m,t)(-m,-t)ᐭy=2d-4x-2672m2-4m-2=t®f2m2+4¯2=—1ঝᵫজ+ঝ674m2—4=0,67±=±1(3)8(1,0)ᐭy=³26ab-2=0,:.b=a-2,x´ᦪ~Ḅ¡¢-+7X=-==="=!12a2a2a2aজba>0--)=—,)=2,22aa2a2aa21••x>$ᱥ+·¸ᔣºaa

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