锟斤拷锟斤拷锟叫旓拷锟斤拷锟絚锟斤拷要锟絣锟斤拷锟侥凤拷锟斤拷

锟斤拷锟斤拷一锟斤拷 锟斤拷锟絰锟斤拷

锟斤拷锟斤拷锟斤拷锟皆猴拷锟轿碉拷記锟斤拷锟斤拷^锟斤拷指锟斤拷锟揭�锟斤拷锟斤拷尾锟斤拷指锟斤拷锟斤拷.锟节斤拷锟斤拷锟斤拷}目锟絩(sh锟斤拷)锟斤拷锟斤拷锟矫讹拷锟絰直锟斤拷锟狡岋拷(d锟斤拷o)锟斤拷一锟斤拷要抓住锟斤拷锟絵锟侥條锟斤拷锟酵結(ji锟斤拷)論锟斤拷锟侥種锟絇(gu锟斤拷n)系锟侥讹拷锟絰.

锟斤拷锟斤拷锟斤拷1 锟斤拷知p锟斤拷-2

锟斤拷锟斤拷锟斤拷锟斤拷 锟絣锟斤拷p锟絖锟斤拷锟斤拷m锟斤拷n锟侥凤拷锟斤拷锟斤拷锟結(ji锟斤拷)論q锟絫锟斤拷锟絖锟剿凤拷锟教的革拷锟斤拷锟斤拷锟絚(di锟斤拷n)锟斤拷锟斤拷m锟斤拷n锟斤拷锟斤拷系锟斤拷(sh锟斤拷)锟斤拷锟斤拷锟斤拷響�(y锟斤拷ng)聯(li锟斤拷n)锟诫到锟斤拷锟絚系锟斤拷(sh锟斤拷)锟斤拷锟絇(gu锟斤拷n)系锟斤拷然锟斤拷锟斤拷锟組(j锟斤拷n)一锟斤拷锟斤拷锟斤拷.

锟斤拷锟斤拷锟斤拷 锟絆(sh锟斤拷)x1锟斤拷x2锟角凤拷锟斤拷x2+mx+n=0锟侥兩傦拷(g锟斤拷)小锟斤拷1锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷0

锟斤拷锟斤拷锟斤拷锟斤拷锟节滿锟斤拷l锟斤拷p锟斤拷m=-1锟斤拷n=锟斤拷锟斤拷锟斤拷x2-x+=0锟斤拷锟給锟斤拷(sh锟斤拷)锟斤拷锟斤拷锟斤拷锟斤拷pq.

锟斤拷锟斤拷锟紺锟较ｏ拷锟斤拷知p锟斤拷q锟侥憋拷要锟斤拷锟斤拷锟斤拷謼l锟斤拷.

锟斤拷锟斤拷锟絚(di锟斤拷n)锟絬 锟斤拷Q锟絣锟斤拷锟叫旓拷锟斤拷锟絵锟絩(sh锟斤拷)锟斤拷锟斤拷(w锟斤拷)锟截凤拷锟斤拷锟絣锟角條锟斤拷锟斤拷锟絣锟角結(ji锟斤拷)論锟斤拷然锟斤拷锟揭�锟絃試锟缴條锟斤拷锟杰凤拷锟狡筹拷锟結(ji锟斤拷)論锟斤拷也要锟絃試锟缴結(ji锟斤拷)論锟杰凤拷锟狡筹拷锟絣锟斤拷锟斤拷锟紷锟接诧拷锟斤拷锟斤拷锟絖锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷c锟斤拷要锟皆碉拷锟叫旓拷.

锟斤拷锟斤拷锟斤拷锟斤拷 锟斤拷锟较凤拷

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷}p锟斤拷q锟街別锟斤拷锟斤拷锟缴傦拷(g锟斤拷)锟斤拷锟斤拷A锟絚B锟斤拷锟矫硷拷锟斤拷锟斤拷锟絉锟斤拷釋條锟斤拷锟斤拷锟絫锟叫ｏ拷锟斤拷锟斤拷A?锟斤拷B锟斤拷锟絫x∈A锟斤拷x∈B锟侥筹拷謼l锟斤拷锟斤拷x∈B锟斤拷x∈A锟侥憋拷要锟絣锟斤拷;锟斤拷锟斤拷A?锟斤拷B锟斤拷锟絫x∈A锟斤拷x∈B锟侥筹拷植锟斤拷锟揭�锟絣锟斤拷锟斤拷x∈B锟斤拷x∈A锟侥憋拷要锟斤拷锟斤拷謼l锟斤拷;锟斤拷锟斤拷A=B锟斤拷锟絫x∈A锟斤拷x∈B锟斤拷锟斤拷锟揭�锟絣锟斤拷;锟斤拷锟斤拷A?芫B锟斤拷A?锟絴B锟斤拷锟絫x∈A锟斤拷x∈B锟斤拷锟斤拷炔锟斤拷锟斤拷也锟斤拷锟斤拷要锟絣锟斤拷.

锟斤拷锟斤拷锟斤拷2 锟絆(sh锟斤拷)x锟斤拷y∈R锟斤拷锟絫x2+y2<2锟斤拷|x|+|y|≤锟侥條锟斤拷锟斤拷锟斤拷|x|+|y|<2锟侥條锟斤拷.

锟斤拷锟斤拷A. 锟斤拷要锟絣锟斤拷 B. 锟饺非筹拷锟揭诧拷潜锟揭�锟絣锟斤拷

锟斤拷锟斤拷C. 锟斤拷要锟斤拷锟斤拷謼l锟斤拷?锟絬D. 锟斤拷植锟斤拷锟揭�锟絣锟斤拷

锟斤拷锟斤拷锟斤拷 锟斤拷锟揭圖锟斤拷示锟斤拷平锟斤拷^(q锟斤拷)锟斤拷P={(x锟斤拷y)|x2+y2<2}锟斤拷示锟紸锟斤拷(n锟斤拷i)锟斤拷锟斤拷(锟斤拷锟斤拷邊锟斤拷);平锟斤拷^(q锟斤拷)锟斤拷Q={(x锟斤拷y)||x|+|y|≤}锟斤拷示小锟斤拷锟斤拷锟轿冿拷(n锟斤拷i)锟斤拷锟斤拷(锟斤拷邊锟斤拷);平锟斤拷^(q锟斤拷)锟斤拷M={(x锟斤拷y)||x|+|y|<2}锟斤拷示锟斤拷锟斤拷锟斤拷锟轿冿拷(n锟斤拷i)锟斤拷锟斤拷(锟斤拷锟斤拷邊锟斤拷).

锟斤拷锟斤拷锟斤拷锟斤拷(锟斤拷0)?锟斤拷P锟斤拷锟斤拷(锟斤拷0)∈Q锟斤拷锟絫P?锟絴Q.锟斤拷P?芫Q锟斤拷锟斤拷锟斤拷x2+y2<2锟斤拷|x|+|y|≤锟侥既非筹拷锟揭诧拷潜锟揭�锟絣锟斤拷锟斤拷锟斤拷锟絰B.

锟斤拷锟斤拷同锟斤拷P?锟斤拷M锟斤拷锟斤拷锟斤拷x2+y2<2锟斤拷|x|+|y|<2锟侥筹拷植锟斤拷锟揭�锟絣锟斤拷锟斤拷锟斤拷锟絰D.

锟斤拷锟斤拷锟絚(di锟斤拷n)锟絬 锟缴旓拷(sh锟斤拷)锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟給锟斤拷(sh锟斤拷)锟斤拷锟紷锟絅锟解法锟斤拷锟角旓拷(sh锟斤拷)锟轿結(ji锟斤拷)锟斤拷思锟斤拷锟节斤拷锟絵锟叫碉拷锟斤拷锟斤拷锟絯锟紽(xi锟斤拷n).锟斤拷(sh锟斤拷)锟轿結(ji锟斤拷)锟较诧拷锟紿锟杰夛拷锟截岋拷锟揭傦拷锟侥斤拷锟絵思路锟斤拷锟斤拷锟斤拷也锟杰夛拷锟斤拷锟斤拷覀锟斤拷慕锟斤拷}锟斤拷锟斤拷.

锟斤拷锟斤拷锟斤拷锟斤拷 锟斤拷锟�

锟斤拷锟斤拷锟斤拷锟矫伙拷锟斤拷锟斤拷锟斤拷锟斤拷}锟侥等價(ji锟斤拷)锟絇(gu锟斤拷n)系锟斤拷锟斤拷(y锟斤拷ng)锟斤拷“锟斤拷锟統锟絫锟斤拷”锟侥旓拷(sh锟斤拷)锟絎(xu锟斤拷)思锟斤拷锟斤拷锟斤拷锟叫旓拷“p?锟斤拷q”锟紻(zhu锟斤拷n)锟斤拷锟斤拷锟叫旓拷“锟斤拷q?锟捷凤拷p”锟斤拷锟斤拷锟�.

锟斤拷锟斤拷锟斤拷3 (1)锟叫旓拷p锟斤拷x≠3锟斤拷y≠2锟斤拷q锟斤拷x+y≠5锟斤拷什么锟絣锟斤拷;

锟斤拷锟斤拷(2) 锟叫旓拷p锟斤拷x≠3锟斤拷y≠2锟斤拷q锟斤拷x+y≠5锟斤拷什么锟絣锟斤拷.

锟斤拷锟斤拷锟斤拷 (1)原锟斤拷锟絵锟饺價(ji锟斤拷)锟斤拷锟叫旓拷锟絨锟斤拷x+y=5锟角凤拷p锟斤拷x=3锟斤拷y=2锟斤拷什么锟絣锟斤拷.

锟斤拷锟斤拷锟紷然锟斤拷p锟斤拷q锟斤拷锟斤拷q锟斤拷p锟斤拷锟斤拷p锟斤拷q锟侥既诧拷锟斤拷锟揭诧拷锟斤拷锟揭�锟絣锟斤拷.

锟斤拷锟斤拷(2) 原锟斤拷锟絵锟饺價(ji锟斤拷)锟斤拷锟叫旓拷锟絨锟斤拷x+y=5锟角凤拷p锟斤拷x=3锟斤拷y=2锟斤拷什么锟絣锟斤拷.

锟斤拷锟斤拷锟斤拷?y锟斤拷n)锟斤拷p?锟捷凤拷q锟斤拷锟斤拷锟斤拷q锟斤拷p锟斤拷锟斤拷p锟斤拷q锟侥憋拷要锟斤拷锟斤拷謼l锟斤拷.

锟斤拷锟斤拷锟絚(di锟斤拷n)锟絬 锟斤拷(d锟斤拷ng)锟斤拷锟絵锟斤拷锟叫凤拷锟絶锟絩(sh锟斤拷)锟斤拷锟缴匡拷锟絔通锟絕锟斤拷锟斤拷锟斤拷}锟饺價(ji锟斤拷)锟紻(zhu锟斤拷n)锟斤拷锟叫旓拷.

锟斤拷锟斤拷锟斤拷锟斤拷 锟結锟絰锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷值锟斤拷锟絜锟斤拷锟斤拷锟組(j锟斤拷n)锟斤拷锟�(y锟斤拷n)锟紺锟斤拷锟斤拷锟斤拷锟叫旓拷锟斤拷锟侥讹拷锟斤拷锟斤拷锟斤拷锟絵锟絕锟斤拷.锟紷锟絅锟斤拷锟斤拷锟斤拷锟斤拷锟絤锟斤拷锟节斤拷锟絰锟斤拷锟絵.

锟斤拷锟斤拷锟斤拷4 锟斤拷锟斤拷ax2+2x+1=0锟斤拷锟斤拷锟斤拷一锟斤拷(g锟斤拷)負(f锟斤拷)锟斤拷(sh锟斤拷)锟斤拷锟侥筹拷要锟絣锟斤拷锟斤拷

锟斤拷锟斤拷A. 0

锟斤拷锟斤拷锟斤拷 锟斤拷锟斤拷锟斤拷锟斤拷值锟�(y锟斤拷n)锟紺锟斤拷锟斤拷(d锟斤拷ng)a=0锟絩(sh锟斤拷)锟斤拷x=-锟斤拷锟脚筹拷A锟斤拷D;锟斤拷(d锟斤拷ng)a=1锟絩(sh锟斤拷)锟斤拷x=-1锟斤拷锟脚筹拷B.锟斤拷锟斤拷xC.

锟斤拷锟斤拷锟絚(di锟斤拷n)锟絬 锟斤拷锟斤拷锟絰锟斤拷锟絵锟斤拷锟斤拷锟矫篩锟絰锟斤拷锟斤拷锟斤拷锟剿忥拷(f锟斤拷)锟絪锟斤拷邏輯锟斤拷锟斤拷锟絕锟教ｏ拷使锟斤拷锟絵锟斤拷锟斤拷锟斤拷锟接冿拷(y锟斤拷u)锟斤拷锟斤拷锟斤拷(ji锟斤拷)省锟剿時(sh锟斤拷)锟絞锟斤拷锟斤拷锟斤拷私锟斤拷}锟斤拷锟劫讹拷锟斤拷锟斤拷锟酵�锟絎(xu锟斤拷)锟斤拷锟斤拷(y锟斤拷ng)該注锟斤拷锟斤拷}锟斤拷锟斤拷锟斤拷锟絰锟斤拷使锟斤拷.

锟斤拷锟斤拷锟斤拷锟斤拷 锟斤拷锟絝锟斤拷

锟斤拷锟斤拷锟斤拷謼l锟斤拷锟絚锟斤拷要锟絣锟斤拷锟斤拷锟叫傦拷锟絝锟斤拷锟斤拷锟斤拷锟斤拷P1?锟斤拷P2锟斤拷P2?锟斤拷P3锟斤拷…锟斤拷Pn-1?锟斤拷Pn锟斤拷锟缴碉拷P1?锟斤拷Pn .同锟斤拷锟斤拷锟斤拷要锟絣锟斤拷也锟叫傦拷锟絝锟斤拷.锟斤拷锟节憋拷锟絕锟斤拷(f锟斤拷)锟絪锟侥撅拷锟斤拷一锟斤拷锟紹锟絠锟絇(gu锟斤拷n)系锟侥條锟斤拷锟斤拷锟缴傦拷(g锟斤拷)锟絣锟斤拷锟絞锟絇(gu锟斤拷n)系锟斤拷锟叫旓拷也锟斤拷锟矫傦拷锟絝锟斤拷锟斤拷锟斤拷锟斤拷處锟斤拷.

锟斤拷锟斤拷锟斤拷5 锟斤拷知p锟斤拷r锟侥筹拷植锟斤拷锟揭�锟絣锟斤拷锟斤拷s锟斤拷r锟侥憋拷要锟絣锟斤拷锟斤拷q锟斤拷s锟侥憋拷要锟絣锟斤拷锟斤拷锟斤拷么p锟斤拷q锟斤拷

锟斤拷锟斤拷A. 锟斤拷植锟斤拷锟揭�锟絣锟斤拷 B. 锟斤拷要锟斤拷锟斤拷謼l锟斤拷

锟斤拷锟斤拷C. 锟斤拷要锟絣锟斤拷 D. 锟饺诧拷锟斤拷锟揭诧拷锟斤拷锟揭�锟絣锟斤拷

锟斤拷锟斤拷锟斤拷 锟斤拷锟絵锟斤拷傻锟絧?锟斤拷r锟斤拷r?锟斤拷s锟斤拷s?锟斤拷q锟斤拷锟斤拷么锟缴碉拷p?锟斤拷r?锟斤拷s?锟斤拷q锟斤拷锟斤拷p锟斤拷q锟侥筹拷植锟斤拷锟揭�锟絣锟斤拷锟斤拷锟斤拷锟絰A.

锟斤拷锟斤拷锟絚(di锟斤拷n)锟絬 锟斤拷锟节兩傦拷(g锟斤拷)锟斤拷锟较碉拷锟絕锟斤拷(f锟斤拷)锟絪锟斤拷锟紹锟絠式锟絣锟斤拷锟斤拷锟斤拷锟矫傦拷锟絝锟皆結(ji锟斤拷)锟较凤拷號“?锟斤拷”锟絚“”锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷之锟絞锟斤拷锟絇(gu锟斤拷n)系锟結(ji锟斤拷)锟斤拷(g锟斤拷u)锟紻锟組(j锟斤拷n)锟斤拷锟叫旓拷锟斤拷锟斤拷锟斤拷直锟絕锟斤拷莸锟教庯拷韱栵拷}锟斤拷使锟斤拷锟絵锟斤拷锟皆猴拷锟轿伙拷.

锟斤拷锟斤拷1. 锟斤拷锟斤拷锟斤拷(g锟斤拷)锟斤拷锟斤拷x2+4ax-4a+3=0锟斤拷x2+(a-1)x+a2=0锟斤拷x2+2ax-2a=0锟斤拷锟斤拷锟斤拷一锟斤拷(g锟斤拷)锟斤拷锟斤拷锟叫岋拷(sh锟斤拷)锟斤拷锟侥筹拷要锟絣锟斤拷.

锟斤拷锟斤拷1. 锟斤拷锟斤拷(g锟斤拷)锟斤拷锟教撅拷锟給锟斤拷(sh锟斤拷)锟斤拷锟侥筹拷要锟絣锟斤拷锟斤拷

锟斤拷锟斤拷Δ1=16a2-4(-4a+3)<0锟斤拷Δ2=(a-1)2-4a2<0锟斤拷Δ3=4a2-4(-2a)<0锟斤拷

锟斤拷锟斤拷锟絇(gu锟斤拷n)锟斤拷锟絔锟斤拷

       锟斤拷一锟斤拷(sh锟斤拷)锟絎(xu锟斤拷)锟絎(xu锟斤拷)锟斤拷(x锟斤拷)锟斤拷锟斤拷锟絉锟斤拷

锟斤拷锟铰高匡拷锟結訊锟斤拷锟竭匡拷锟斤拷锟斤拷锟斤拷锟斤拷前锟斤拷(zh锟斤拷n)锟斤拷锟斤拷志愿锟斤拷锟�(b锟斤拷o)锟斤拷锟饺★拷锟�?j锟斤拷n)?sh锟斤拷)锟斤拷锟斤拷

锟竭匡拷锟絩(sh锟斤拷)锟絞锟斤拷锟斤拷全锟斤拷锟斤拷要锟斤拷(ji锟斤拷)锟絚(di锟斤拷n)

锟組锟斤拷"锟竭匡拷锟絎(w锟斤拷ng)"微锟脚癸拷锟斤拷號