2.\r@h/012`I\r2\r" x=l 0@y =_2,\r2\r.N (I, _2) . ......................................... 5 D\r2\r(3) - I W W 2 . ................................................. 7 D\r81. 2018\]`/a?J" S ' @> = 0 ^ + -3/ 0\r A -l,0v B 4,5.\r1h`\r2 J4 ? wx H`FGJ`\r3 ?x Hn`¡@ P £¤Jw* H`JL J/¦h§w\rM , ¦J4 ? §wN . " M < P N 0@ P `V©`p?\n.\r6 ,\r5\r4\r3\r1 2 3 4 5 6 4\r-4\r'( 1*-1,0v 4,5Dª-. -5 -\ry = ax2 + h x - 3(a0),\r0 = Q - /? - 3,\r3\r5 = 16\r+ 4/7 - 3,\r'3 a = l, b = -2.\r/`Iy = x2 -2x-3. 2\rD\r2 {3 4,5wx H`FGI\r,