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-JYECDal

2023-2024()

(8,3,24.)(2,

,)

1.(3),()

ra@

2.(3)zy,()

A,2x-12y-1B,-r+1-y+1C.maxmyD,-r-y

3.(3),4BCD()

A,AB=CD,AD=BCB.ABCD,AD=BCC.4BICD,4D|BC

D.LA=LC,LB=LD

4(3)QU,ZEAABCH,LACB=90°,M,NW4B,BOKWHA,4B=10,A

MN=3,RBOMKA()M

5.(3),()

A,-4=(z-2)(z+2)B.(a-1)?=a2-2a+1C-2z-6=z(z-2)-6D.a(e-1)=a?-2

6.(3),HAABCH,BC=6,4BBCM,NMCA

,4M,AN,LC=ZNAC,AMA4N()

21

-JYECD

7.(3)z2Fo=5,a()

A,-6.-3C6.3

8.(3),A4BC,4BC4CB0,0BBC4BA

E,SACPAF,0O0DL4CD,:OEF=BE+CF;@ZLBOC=90°+4ED

LA;@0A4BC;@0D=m,AL+AF=n,MS,4np=bmn,eX

().

41,2C.3D.4

(5,3,15)(3,,

)

1.(3)45,___.

2.(3),y=ka-3m(-4,0),zkz3my,

.

4OE

3.(3),4BCHh,LBAC=90°,AB=4em,BC=5em,AC=3cem,A

4BCBCacmfa5)DBP,4CDBG,

4D,cm._G

BECF

4(