8n x m+n A-3 B-1 C1 D3

15 xy y----- ; x+y-----

15 ,y----x+y-----

1122ABPADPAEQADPAEQADEAEADEAD60PAQ60EADQADPAQQADEAQDAPAPAQAPDAQESAS

B13C10y=x+kBx

AABCABABD.

1A________D________

2y= 1\3 x2+bx+cCD

32yyE

MAB

EMx.

.

2AB10ABXY, AOM______ABOM

3r A1O1r

601OABO

270ABAB6mO m

201221 AB=AC=10cm BC=16cmDE=4cmDEDBBC1cmsCECEEFACABFDFtt0 1tBEEFBE= EF= 2DEF t 3MNDFEFMN

(2010 ABCDAB=2AP=1PPEPFBC1PEAEFM

201325. (13) ABCD, EBBCCAEDE, AEAG, FGD. (1 ) (2)AEFGABCD(3) BE EBCG

(2013EFADAE=DFCFBDGAGBEAGH2HD.

EFADAE=DFCFBDGAGBEAGH2H

2RtABCC=90AC=6cm BC=8cmPAACC1cm/sQCCBB2cm/sPQt0st4sPQM

36ABCEADECECCEFEF DF