2021-2022学年福建省福州市八县（市）协作校高一（下）期末数学试卷（附答案详解）

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2021-2022
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18=2sin(a)x4-(/>--),6.:/(%1)J/(%)4f(%2)1x2\min=%•••T=2X-=TT=—,to=2,2o)•••/(X)᜻ᦪ•••8=kᐔfceZ,ᓽ0=+WZ,V0<<7T,••(P=-,•/(%)=2sin2x.(2)ᵫ⚪#$g(x)=2sin(4x-9%g(x)=2sin(4x-g)=$&%'((§=|+,Mx-Se⌗5ᐔ.,%t=4x-g,ᑣteg,57T,ᦪy=sintᙠte5ᐔ.1Ḅ34᝞63ᡠ8ᵫ3$9y=sint:y=|ᐳᨵ5<=>9(?)=gᙠᦇGA⁚1ᐳᨵ5<᪷ᓽn=5,ti+2t2+2t3+2t4+t=(ti+t)+2(t+t)+(t+t)542345=2x—+2x2x—+2x—=24ᐔ222&••+2X4-2x+•••+2x_i+x23nn=+2X+2X+2%+x2345=D(Q+2t2+2t3+2t4-1)+8X45_207r-3.ூ᪆௃(1)ᵫ|%1-Nzlmin=.OPᨬRSᕜUOPV=2,0W᪷X/(%)᜻ᦪOP9='OPf(%)Ḅ᪆Y

19(2)OPg(x)=2sin(4x-_`ab_g)=|ᣚᐗefᔠᦪ34ᑮn=5,ᑭᵨᦪlmឋᑮN+2t2+2t3+2t4+t=(ti+ᑭ+2(t+t)+(t+t)=5234524ᐔ,ᵫpqOP/+2*2+2*3T---+2Xn_i+xḄu.nv⚪ὃxyzᦪឤ|}ᣚஹ᜻ᏔឋஹᕜUឋஹ34:ឋ|Ạ9ὃxOq᫏⚪.18⚓ᐳ18⚓