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^11 1 = 2xl? )lEE-d 5el 109 ral 3-14 -sf tr= ^lLftrl g!-d 7+= ol+= !C Ioit^it 4l ql^1 E"J+ zldg +EI.-ll= ,llzllE+4e 4 (3-7) e'l qlE ++61 Y++. el= Eq {*: I + t,Y :1 - t}, {x : I + t3,Y : I -t'}, {x :t, y :2 - t} Eol gltrI. "l= 4=e E-+ t- zlz16l.E x + y 2 : 0ol gr+. ^l (3-6)+ ^l (3-z;o1 7rv= e^te- v y=- rHzll gf ta1 El]+ lz}4oll F 4ql^-l 1zla3-e1 zllf a, bE -x,L --l OL ) u' +br:1............. """"(3-8) ol 4- +al= ,*-+- d ol rI. .J eI4 ge ^l (3-O; o g -E^l q = ,}] zll trf € EllE 4dq *c4 "l 4 (3-8)E +Zl= -ftzlaltr,llzlltrf tE d+E zJolS +4'}]q, ulzllpfz} d+E z)oltr- g.^l€ 49 xl€o]]zlltr+€4(natural parametric form)4I lJ =rl -r-= uf . r4:l vJgtlql zldg Ael6I= *Bql= zl daga}= *B [:zH 3-1s, 16] F r+ zl e E € 9-J:= "l +61= ,JB E ol 9l trI. (r 3 3-r7 , 18) H(X) ral 3-15 trI|. 4oll el-d ^lc8el ra 3 16 4=oll 'Je-aF ^lctrel