2021考研数一真题及解析

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2021ὃẆᦪ⚪ᫀᦪ⚪ஹ⌱⚪1-10⚪,⚪5ᑖᐳ50ᑖe-iপᦪ/“=!',ᙠx=oᜐ1,x=0A$%&'(᩽ᜧ+B$%&'(᩽+C-.&.ᦪ/01D-.&.ᦪ891ফ;ᦪ/(x,y)-?&/(>+1,1)=B(C+1)2,/(x,x2)=2/inx,ᑣ4(1,1)=()(A)dx+dy(B)dr-dy(C)dy(D)-dysinJC(3);ᦪ/(x)=^~yᙠX=0ᜐḄ3QRST⚗V9W+X2+“3,ᑣ()1+X77(A)Q=Lb=0,c=—(B)a=l,b=0,c=—667=7(C)Q=-1,h=-1,c=—(D)ci=-1,b=—1,c66ভ;ᦪ/(x)ᙠ_`a0,1bc$%ᑣd/(x)e:=()J0S,/21ஹ1(B)hme^/(/—2q—iஹ)-ig᝞a/ijTZi2஻n(Olir&nT/(—k—\)-1(D)lim£2஻f(—k)—2"T8oInn2nn5wQx/%,z,z={+%>+%+W2-}%2Ḅ~ឋᢣᦪឋᢣᦪQ9()(A)2,o(B)l,l(C)2,l(D)l,2T'1)’3ஹ(6)=0,a22,%16=ab4=᜜,=%-//i-1-P,2JJ2,᧎,ᑣ4,4Q9515151(A)-,-(B)--(C)—222222;A,39஻▤▣ᑡ8ᡂḄ=2r(A)=2r(A)

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⊤☢Ḅ᜜úᑣû☢üᑖJJ%2d)dz+y2dzdx+zdxdy=.(15);A=%ᑓ93▤▣&9þᦪÿ
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Jτ0¶A—1-I.4|=-I—2-1=(—+IX——3)11A*W
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¿jS4,L12U-&-2ஹ66C¬Ḅ-X-2.66fijxoy☢ᡷ²ᨬᜧ66.20S¨⚪Xᑖ12ᑖR஺uÃᨵÄᓫÆÇÈÉ./S஺R="S4---/"1Ê’.
ᨬᜧµḄÌᑖÉÍ1Y/S஺RḄµ.(xe'*"Ñ+.1,Ò+(4iex***-x]dyফÏÐI.ᐸ$Ñ஺ÃAḄÔᔣÖÄ.x2+4y2a>,ூᫀ௃-n.ூ᪆௃SDᵫØÌᑖḄÙÚÛÜ©j/D=4-./-jRdb.ÝÞÝ4--//ᙠ஺¬Dᜧà0á,/DâᑮᨬᜧᦑAjY+ä44/Dj=½de4-rz]rdr=8”.ফ⊡D:Y+4I2=LS/•æÊR..஺Ḅçᔣèá┐çᔣ.j(.S7’+y)dx+(4j,ex+'-.VkA'Y+4/r+F)tZx+(4j'8'~".-.v)ᵫ.r(XeU"'+]')at+(4ie*z'/ê)ë'ì!ìY+4/1X2+4y2=-L/[.u/x+41í’-L-jydx-xdy-L1(-2do•=/7.'îrrZX1ZX

12(21)(¨⚪Xᑖ12ᑖ)faI-1ஹï©/=1a-1.ஹ-1-Ia,(1)YIEð▣P,fó
ôHPö÷▣:(2)YÔøùC,û
G=(a+3)£-A.ூFᫀ௃(1)P=ூ᪆௃(l)ftl|zE->l|==(z-o+l)'(x—a—2)=0oriiḄᱯᔣ=00,⁚4=2,=a-ᡠ’-1-1((«-1)E-J)=—1-100Ḅᱯᔣ力I:—忑I__fL14耳.ᑣ஺4=HWHrI正F。(2)PTC-P=!(a+3)E-.4)P=((a+3)£-A=4k

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