高考数学复习易做易错题[原创]--高考数学复习易做易错题3

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53
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564ᦇ~஺05-rze“53ீ%ᦇ=—,%ST$y=—x+—=0224wkWᙠ^x=1⚪஺2ᦑlm?',2nIJK4/V=ioᨵVᐳ?ḄSTᨵᩩ531ᑖ$y——2x+1,y——2.x+3,y=—xH—,x-஺242r2222.>ᙊST$v+=1,k¡ᑡᩩ
ḄᙊSTজᙊᙠᙊḄ¤164¥¦'ঝIᙊḄ¨¥Xᑗ'ঞIᙊᙠª?ᜐXᑗ஺¬ᫀ᪷®⚪ᙊST$x±r2+J=/জᓄᙊST$᮱+4³=16ঝᵫজঝ´µy,%3-±8¶+16=0,ᵫᙊIᙊXᑗ=64஻—4x3xl6=0,%U=3ᓽᡠkᙊḄST$x±+/=3,¹ᵫº»x±22+y2=4ᔠ⚪஺┯X½JJ2+y2=3┯j¾x±2>+y2=423.>y=ax+lIJK3x2—y2=1XLM?xÂᔲᙠÄ᪵ḄZᦪQa,H%A,BᐵMy=2xÈÉÊ᝞ÌᙠkÍZᦪa,᝞ÌWᙠÎÏÐᳮᵫ஺¬ᫀᙠZᦪa,H%A,BᐵMy=2xÈÉGAx”y஺Bx,y\,ᑣ22%+$=2$+%]KB='Uᵫ\=1tÔ᦮ᳮ%4ᜩ13஽ߟ$=1"Ø&=3~+Z..=Úᵫ3x2K—1,ᦑWᙠÄ᪵ḄZᦪa஺Ü2,U+22

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]¥ÈÉḄâØVᩩ
ABIy=2xᚖ⌼ᡂ⚪┯æ஺24.(>)é»ê?A(3,0),B(0,3)᝞ÌëABIìᱥCy=-x?+D1ᨵnoᨵVᐳ?kmḄñòô஺¬ᫀëAB¦õ?P(x,y),÷tëABḄêøᑖ?ᡠù3úX=----(2>0),ᵫëABIìᱥCᨵnoᨵVᐳ?ᡠùST=—(¦)2+஻?(¦)—1ᓽ4Ü+(5-3/n)2+10—3m=0ᨵnoᨵV1+Z1+21+2ü]rúA=(5-3/n)2-16(10-3m)=0„ᓝr᪷ᡠùJ7'জᡈ2>0rio-3/M<0\,ঝA=(5-3m)2-16(10-3^)>0জm=3,ঝm>W,ᡠ!m>Wᡈm=3஺33┯$%&ABḄ)*+y=-x+3,/+AB01ᱥ&Cᨵ56ᨵ789ᐳ;<ᡠ=)*-x+3=-x2+mx-1ᓽ/-(஻?+l)x+4=0ḄᑨDE=(/"+I)2-16=0HI=3ᡈI=—5஺┯/$K⚪MNᑣ2x/7y/=2,2x2—y22=22222hopq2(xi+x)(x—x)—(yi+y)(yi—y2)=0,2l22rxmx,s<ড.=uv=w1=^=2'2X]-*2+'22

58%&/Ḅ)*2x—y—1=0{y=2x—1|ᐭX?-2-=12X2-4X+3=0)*~%&MᙠrX1=X2<%&)*+x=l,0ab&6ᨵ789ᐳ;஺ᡠ!<%&IMᙠ஺;$⚪᧕┯;7ᵨ“ᑖ”VHI᳛M┯Xi=X2sḄ¡஺26.¢u£^¤¥᝞§<¨©7ª«ᦪy=Lc+/?S>0¥0ª«ᦪ>=/Ḅ§°pXy=kx+b±$জᵫ<1=>x2-2kx-2b=0%1+x=2k,xx=-2b=-12212-1212_3bOAOB=xlx2+´µ=x\x2+2X<-2%2—4ঝAF-t,BF,+tx-,-0t——~Ḅ,¶2)*--2kx-\-0Ḅ᪷

59.E+ᯖ;<ᦑ¿ᯖÀ+Á஺2221HÂᙊ)*+{B;ᙶ᪗|ᐭ)*<=1¢஺2=7Æa22136a----4¥ᡠVÂᙊ)*+=i$জ^9o⌕ÈÉ$ঝ^ÊË┯Fj27.¢u£^¤¥ᙠRfAABC^2)ä;Ḅåæ)*+=+ᯖ;ḄÂᙊa=42,c=\,b=1,E'■+y2=1ঝ/0yâçᔠ0121+2k2E=64/—24(1+29)ு0,Á2ு3,ᳮf’¸2DNx-xxND2

60,,1%1x(x,+x)2c20k2-61016222xx,x,x3(1+29)33(242+1)2220:.a>-j,ὃ7/(x),„f(x)8xḄ9ᓄ⊤஺᣸ᑡ>ᔠ@⚗BCᳮEஹ⌱H⚪1.(IJKL)c2.+c2rḄNOᨵ()PA1B2C3D4

61r+l<10QRᫀB┯ULVNWᵫ◚Yᩩ[1-7ஹ8ஹ9஺[17-r<102.\IJKL]^n_᜻ᦪᑣ7"+C7"T+C7"-2+…+CT.7e9◀ᡠ+gᦪ\]A0B2C7D8QRᫀC┯ULVhi_jBklm\7+1
”,ᐸoNlACு3.\IJKL]Pqrst\ᐳvPᜧw2P#x]y“{|”ஹ“᫃ᛞ”#᜜ᨬWᙶ4wᐸK#xNWᙶEᑣNOḄyᦪ\]A40B48C60D68QRᫀB┯ULV6wyḄᑖᫀᑖ_3ஹ3'2ஹ4,3ஹ3mᙳᑖN,2ஹ4ᵨ᣸◀ᣵ¡#xᙶEḄᦪ஺4.\IJKL]_¢£¤Ḅᓝ¦ᜧ§¨©Eᦻ«¬®¯°¢£±²ᜓḄ⁚µKjᨵ4P⁚µ᝞·¸ᢝº⁚µḄ»0¼½N9¾$¿À2P#Á⁚µ஺ᑣNOḄ᣸ᑡᨵ\]A20B25C30D32QRᫀC┯ULVÂÃ#Á⁚µÄÅ᣸EÆ஺5.\IJKL]\x-l
”ḄÇÈBKYxᏔᦪÊËḄ⚗ḄÌᦪ'\]A1024B-1024C-1023D-2048QRᫀB┯ULVᙠÎᨬÏEP-1஺6.\ÐK]ÑÒᛢᨵAஹBஹCq#AÄy3wBÄy2wCÄy1w஺Õᨵ3Pᡂw'2PÖ×ᑖyº_ØᐰÆÚÖ×ÛᵫᡂwÜOWy஺ÝÞᑖyºḄᐳᨵ\]஺A.120B.81C.72D.27^P#x1PᜧwᙠAᑣᨵ஺ß3=9^1P#xPᜧwᙠ4ᑣᨵ=6^1P#x1PᜧwᙠAᑣᨵ஺>஺ß2=12

62ᐳᨵ9+6+12=27.•.⌱Dèéê⚪᧕ᙠᑖìíîïV┯hᡈᨵñòᡈᨵ⍡ô஺7.\ÐK]6õö÷Ø᣸ᙠ3P÷ùúP÷ùûüØ᣸Eõö÷ᑣNOḄØ᣸ᨵ\]A.360B.240C.540D.210ᑖᑖ1,2,31,1,42,2,2ᑖᦪ᯼ᡈG+c^pi+cC=540.•.⌱C!"⚪᧕┯&ᜐ()*+ᫀ-⌕/A',23+ᫀ4/ὡ678ᙠ:)*+ᫀ-(4ᙳᒴᑖ=6>23+ᫀ(ᙳᒴᑖ=஺8.ABCDEFᔠH1,2,3,…610JC⌱K5Lᦪ=ᡂḄOF6PQR5LᦪCḄST*LᦪḄU4V:11,ᑣR᪵ḄOFᐳᨵADL஺A.10B.16C.20D.32]FᔠC*LᦪḄUV:11Ḅᑖ3=6ᐳᨵ5=A1,10D,A2,9D,A3,8D,A4,7D,A5,6D,ᐳᨵ=32L.•.⌱D!"⚪᧕`aᡈ⍡c6defgᑖ=2ᑣhiRjk⚪஺9.ABCDlm1,2,3,4,5ḄnLo6ᑖpᙶᙠlm1,2,3,4,5Ḅrsf,ᑣtuᨵ*Lmṹ3wḄᙶ+ᦪADA.120B.119C.110D.109ាᨵLmṹ3wḄᨵC+6ាᨵyLmṹ3wḄᓽ(nLmṹᐰ3wḄ,|ᨵ•+ᐳᨵᱏ3~31=109+.•.⌱D10.ACDᐳᨵ3o6Eᕜ3tᕜR7ᜩC6ᜩ᣸3o6ot2ᜩ6ᐸ᣸ᐳᨵAD+஺A.5040B.1260C.210D.630

63CC-3!Do—63Uo21Loᐜᢧ*ᜩ62LoEᒕḄ5ᜩC⌱2ᜩ6ᒕḄ(LoḄ6Loᡠ⌱ᐰ᣸ᑡ6p63LoLoᑖ=6⌕◀2஺ᡠ⌱D11.ACDᑴA,B*+¡ᑺ6◤⌕ᵬஹ¦*+7ᧇ6¨©A+¡◤ᵬ7ᧇ3ª«6¦7ᧇ5ª«B+¡◤ᵬ7ᧇ5ª«6¦7ᧇ4ª«஺¬ᨵᵬ7ᧇ20ª«6¦7ᧇ25ª«6AஹB*+¡tᔜ3ᑺ6ᑣᐳᨵᑴAD஺A.2+B.4+C.6+D.8+D஺¯*+¡ᑖpᑴᑺx,yeN*
,°⚪±Qr3y²lIWyW—x+4O]-55253x+5yW20[IWyW--x+—"4V=ᡠ⊤´Ḅµ44ஹ¶᝞¸5x+4yW25ᙠtᔜ3ᑺḄ¹º6ᐳᨵ8+4»Ḅᑴ஺⌱D,¼½¾☢µ¶ᑁḄ᦮~LᦪÂᨵÃÄ஺12.AᫀCDᨵ6Å᫹O᣸ᡂ3᣸,ÇᨵoÈr6ាᨵ*Å᫹OÉÊḄ4»ᙶᦪ(A)Aஹ36Bஹ48Cஹ72Dஹ96

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┯¼78æ⚪᩽᧕⍡cèᑖÖ×14.3CD¨©Ö×ax+by+l=0CḄa,b(ØÙFᔠ{-3,-2,31,0,1,2}CḄ2L4»ḄᐗÛ6ÜÝÖ×ḄÞßàᜧ:60°,âãäᔠRjᩩéḄÖ×ḄᐳᨵA.8ᩩB.11ᩩC.13ᩩD.16ᩩËÌᫀD15.A3CDê´ëfḄ7Lìí᣸ᡂ3᣸6Lìíê´îஹï*+ð⁐6ᡈ4ê´.òê´ᐸCLìí6óÉÊḄ*Lìí4»ôê´6ᑣõê´ëÍöê´Ḅ4»Ḅ÷m+ᦪA.80B.60C.48D.10ËÌᫀA16.A3CDøùᨵᵬஹ¦ஹúᩩᜧì4»Ḅû‷6ᵬᙶ3o6¦ᙶ2o6ú|Íᙶ1o6Çᙠ3Lᜧoý2Lìþÿ‷ᓫ1ᙶ‷ᑣḄᙶᦪᨵA
21B
27C
33D
34ᫀB⚪1.!ᔠᵨ={x|14x«10,xeN},$%Ḅ&'!A,()A*+,ᐗ.k,/0121345᝞A={1,3,6},(475821>1+-1
.3+-1
66=2,ᑣ$MḄᡠᨵ&'!:;5Ḅ<=2560.2.>*?@AX]+X2+X3+X4=5ᐳᨵCḄ&D᦮ᦪF஺ᫀ56┯IJKLᑖN4F3.>*ᐵP⚗RX—1
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