圓錐曲線二級(jí)結(jié)論秒殺技巧（學(xué)生版）

,(-c,±拋物線y2=2px(p>0(通徑的端點(diǎn)坐標(biāo)為,±p(.,B(c,-進(jìn)一步可得通徑長(zhǎng)11EQ\*jc3\*hps14\o\al(\s\up4(2),A)(,BB.1C.2D.4-y2=1B.x2-A.A.2B.22A.2B.4C.8D.933⊥PF2A.2B.2C.22DF)A.B.C.3D.EQ\*jc3\*hps25\o\al(\s\up13(1),1)EQ\*jc3\*hps25\o\al(\s\up13(1),2)EQ\*jc3\*hps9\o\al(\s\up9(2),1)EQ\*jc3\*hps9\o\al(\s\up9(2),1)EQ\*jc3\*hps9\o\al(\s\up9(2),1)EQ\*jc3\*hps9\o\al(\s\up9(2),1)-b244直線AB的方程為()A.2x-y-1=0B.x+y-1=0C.x-y=0D.x-2y+1=044D.4A.B.2C.D.42EQ\*jc3\*hps22\o\al(\s\up7(y),2)EQ\*jc3\*hps16\o\al(\s\up6(x2),a2)EQ\*jc3\*hps22\o\al(\s\up7(y),b)EQ\*jc3\*hps16\o\al(\s\up11(2),2)EQ\*jc3\*hps22\o\al(\s\up6(1),2)()22A.B.C.D.A.B.C.D.到橢圓的面積除以圓周率π等于橢圓的長(zhǎng)半軸長(zhǎng)與短半軸長(zhǎng)的乘積.已知橢圓y2+x2=255()A.(1,1(B.(-1,2(C.(1,4(D.(1,3(A.(0,1(B.(1,+∞(C.(-1,0(D.(-∞,-1(EQ\*jc3\*hps16\o\al(\s\up6(x2),a2)EQ\*jc3\*hps22\o\al(\s\up7(y),b)EQ\*jc3\*hps16\o\al(\s\up11(2),2)EQ\*jc3\*hps22\o\al(\s\up9(—),H)EQ\*jc3\*hps22\o\al(\s\up9(—→),O)A.3B.3C.2D.2)D.)D.44A.C.B.C.3A.6B.2C.3D.266A.2B.C.D.9A.9A.D.C.B.D.C.9EQ\*jc3\*hps20\o\al(\s\up8(—→),F)EQ\*jc3\*hps20\o\al(\s\up8(—→),B)別交兩條漸近線于P,Q兩點(diǎn).EQ\*jc3\*hps21\o\al(\s\up9(—→),F)EQ\*jc3\*hps21\o\al(\s\up9(—→),P)77)EQ\*jc3\*hps22\o\al(\s\up9(—→),F)EQ\*jc3\*hps22\o\al(\s\up9(—→),N))、A.C.D.、A.C.D.B.232 2 222-2EQ\*jc3\*hps22\o\al(\s\up9(—→),F)EQ\*jc3\*hps22\o\al(\s\up9(—→),1N)D.A.3B.2C.2D.2EQ\*jc3\*hps22\o\al(\s\up9(—→),A)EQ\*jc3\*hps22\o\al(\s\up9(—→),B)EQ\*jc3\*hps22\o\al(\s\up8(→),0)2-22-2 22-2.EQ\*jc3\*hps22\o\al(\s\up9(—→),N)EQ\*jc3\*hps22\o\al(\s\up9(—→),M)EQ\*jc3\*hps22\o\al(\s\up9(—→),F).882y1y2=-p.xAxB=m2,yAyB=-2pm.①以弦AB為直徑的圓與準(zhǔn)線相切.②以AF或BF為直徑的圓與y軸相切.A.2B.3C.4D.5A.1B.2C.3D.4A.B.C.D.EQ\*jc3\*hps22\o\al(\s\up9(—→),F)EQ\*jc3\*hps22\o\al(\s\up9(—→),B)99A.±B.±3C.±1()33EQ\*jc3\*hps22\o\al(\s\up7(1),4)EQ\*jc3\*hps22\o\al(\s\up6(1),2)A.∠AOF=∠BOFB.|AB|=EQ\*jc3\*hps22\o\al(\s\up5(32),3)C.S△AOB=D.∠AOB<90°D.與拋物線C分別相切于A,B兩點(diǎn)的兩條切線交于點(diǎn)N2B.以AF為直徑的圓與y軸相切C.當(dāng)AB⊥x軸時(shí)，|AB|取到最小值pD.若點(diǎn)M為拋物線準(zhǔn)線與x軸交點(diǎn)，則一定有∠AMF=∠BMFEQ\*jc3\*hps22\o\al(\s\up5(x),2)EQ\*jc3\*hps13\o\al(\s\up9(2),5)EQ\*jc3\*hps13\o\al(\s\up8(y2),16)EQ\*jc3\*hps22\o\al(\s\up5(π),6)EQ\*jc3\*hps22\o\al(\s\up5(16),3)EQ\*jc3\*hps22\o\al(\s\up9(—→),A)EQ\*jc3\*hps22\o\al(\s\up9(—→),B)A.B.C.3D.EQ\*jc3\*hps22\o\al(\s\up5(x),4)EQ\*jc3\*hps22\o\al(\s\up7(y),5)EQ\*jc3\*hps22\o\al(\s\up5(9),2)C.A.C.3x2-y22x2-y22A.B.C.D.A.B.C.D.EQ\*jc3\*hps22\o\al(\s\up5(x),4)EQ\*jc3\*hps22\o\al(\s\up7(y),3)EQ\*jc3\*hps22\o\al(\s\up5(3),2)被橢圓截得的段的中點(diǎn)所在的直線方程為(A.y=xB.y=-2xC.y=-xD.y=2xA.4B.3C.2D.1EQ\*jc3\*hps16\o\al(\s\up6(x2),a2)EQ\*jc3\*hps22\o\al(\s\up7(y),b)EQ\*jc3\*hps16\o\al(\s\up11(2),2)FA.3B.C.2A.3B.C.2D.22一點(diǎn)M到F的距離的最大值為()EQ\*jc3\*hps22\o\al(\s\up5(π),3)()14-22D.