中考真题-广东省数学中考真题

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2021
ḕὃᦪᔁ▬ᫀ
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2ABEC14.ᐗ!/+$+c=஺(b,c&ᦪ)Ḅ)᪷%,-./-3<<1,1ZADB=45°,ᑣ?@C஺ABḄᨬDE.FஹGH⚪[2x-4>3(x-2)18.GJKLM|x-719.OPQRSTUVWXYZᦻᓄ]^_`.ᵨbᓫdef᪵ḄhijRSᐰl600mPnfo20mᐸ_`ᡂr᝞stᦪu87654321°S'JJ”₹ᡂrx(1)yz20mPnᡂrḄ{ᦪ|ᦪ}<ᙳᦪ(2)ᡂrᜧᡈK90ᑖWXKSjRSWXKSḄPntᦪ.3/14

320.᝞ᙠRAABCNA=90°:BCḄᚖ<ᑖ?
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ᑖḄឋFGᳮHIJ:5ᮣLMᵨNᐵIJᡂR3DEBWRlADCBUBE=BC,ᯠᑭᵨᳮBE=8C=x,A8=AE+8E=.r++!Q<⚪ḄᐵR.x/3.ᨬ᪷ᳮᑡx,AB.8.Aூᑖ᪆௃ூ!௃✌ᐜ᪷WḄ᦮ᦪZᑖ[\஺Ḅ]5\6Ḅ]5ᯠ^a_bḄ]`ᐭbcᓽ[!#᝞%#&஺(DE_LAB,ᚖ*+Eᑮᡠ`ᦪḄ].AB,-.NAC8=90°

7ூ!௃00<⚪ὃ᩵Bpq}ᦪḄឋ5ᐵᏉ,ᵫvI"6,w☢ᨬᜧ]ᓄ+pq}ᦪV3=(2x2+>/i0)(4-x/i0)=(4+Vi0)(4->/i0)=16-10=6.[I5C:ᙠFO஺Ḅ4:E+▢5F5p[ODp1+.Ḅᙊr¡5C஻+ᙊE22ᦑ⌱#A..ᨬᜧ5ᵫ¢ᓽ[!.ூ:ṣ௃ூ!௃<⚪ὃABpq᪷Ḅrc5s\\6-ộḄ᦮ᦪZᑖ஺_kᦪZᑖbḄ],!⚪ᐵR.!#᝞£%ᡠ¤#&C:(.ஹ¥ᚖ5ᚖ*+“5A8_x¥Ḅ§:+D,9.Cூᑖ᪆௃ᵫvI[a+b=6,S=y]5(5-a)(5-b)=8y/ab-5.w6=6
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AB=12,ூ௃:.BE=AB-AE=12-3=9,x6v•
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y=(x-40)4100-2(x-50)],=-2x2+280A-8000BO=^BQ=^OQ=\b\=2,22ÀF#y=-2(x-70)2+1800*b<0,x=65.\•GᨬᜧH1750ᐗ.Ay=-2A:2+280.v-8000(507y=-2x2+280x-8000(50

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MBC]Z.CFB=180°-Z.CFD-NBFA=90°ᓽE^FCFA.FB


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13寸1三.Ja-6+c=0(b=-2a19a+3b+c=0[c=-3a4+/=%+ᙳঞMANNOPQR,••y=ax2-2ax-3a,J3+”=0+஻WJ4x-12?Ḅ@ᦪ᪷ூ2m௃A=0n⚪p⌕ὃst+,ᦪḄiᔠuᵨ3wxᑮ+,ᦪ-?FZ3ὃstyz{|}Ḅ~
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