2023届黑龙江省绥滨某学校数学七年级上册期末统考模拟试题含解析

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2022-2023
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8ூd௃9⚪ὃ:eᐗfEaḄ$ᵨ)hmlᐵ()nᑡ`ᐗfEa%⚪Ḅᐵ?.17ஹ15°ᡈ105°ூᑖ᪆௃᪷⚪.)ᔠEᑖOÏï)᪷b`NBAEḄôᦪᓽ.ூc௃NA²ZDḄ⚔ᔠ)AC஺Rᔠ)ᨵsOEজ᝞1ᡠ)¸§NBAE=NBAC-ZEDF=60°-45°=15°,ঝ᝞
2ᡠNBAE=NBAC+NEDF=60°+45°=105°,ᦑᫀ15°ᡈ105°1Nூ!௃#⚪ὃ&'()*+),Ḅ./0⚪Ḅᐵ23456ᔠ89ᨵ;<=>?
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9.•.ᵬgᑮ{BᙢmgBᙢ80ᓟV80>48...ᙠmgiAᙢyzBᙢḄQR+;gḄᙢᦑᙠᵬgᑮ{Bᙢqmg~Bh0.5I;gs40ᓟ240-80mgBhb=᱄+0.5=2.5I80ᦑmg?p2.5I;gs40ᓟ.ூ!௃#⚪ὃ&'Bg_RḄ⚪0ᐗ8RḄ8a_Rஹ\,bḄᐵ30⚪Ḅᐵ2.19ஹ9=a?+3ab1.ூᑖ᪆௃ᐜ¡¢ஹᔠ=£¤⚗ᓄ§9~᪷[¨©ᦪឋ¬k?aஹbḄ®ᐭ./dk.ூ0௃09=5ab+4ab-6a2-6ab+7a2=a?+3ab,,:(1+a)2+=01a=-l>b=—,3ᑣ9=l
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ᨵᳮᦪḄ.22ஹ-1.ூ᪆௃⚪ᑖ᪆ᔠᑮᨬ!"#$Ḅ%&ᐭ(ᓽ*.⚪᪆--2ab+3a-4a+2b+lab—~a+2b.,a=3,b=l.!=-3+2=—1.23ஹ-2x2y+7xy,1.ூᑖ᪆௃ᐜ1ஹᔠ23⚗!5"x=-Iy=-2&ᐭᓄ7Ḅ8!(ᓽ*.ூ9௃=3X0:[2<2)-6=+3%2?:@]=3x2^-[5x2y-7xy]=3x2y-5x2y+7xy=-2x2y+7xy,,x=_1,y=_2.!=_2X(_1)2X(_2)+7X(_1)X(_2)=4+14=18.ὃC᦮ḄE:ᓄF%.