1. 64/779
2. 192/779
3. 240/779
4. none of these
none of these
1. 3/8
2. 1/8
3. 2/8
4. 5/8
1/8
1. √3(x2+y2) = 4xy
2. 4(x2+y2)= √3xy
3. x2+√3y2-2xy =0
4. x2+3y2-2xy =0
x<sup>2</sup>+3y<sup>2</sup>-2xy =0
1. (1,1),√2
2. (1/2,1/2),√2
3. (1/2,1/2),1/√2
4. (0,0),1
(0,0),1
1. x2+y2+cx+cy+c2=0
2. x2+y2-2cx-2cy+c2=0
3. x2+y2+cx+cy+(c2/4)=0
4. x2+y2-cx-cy+(c2/4)=0
x<sup>2</sup>+y<sup>2</sup>-cx-cy+(c<sup>2</sup>/4)=0
1. 6
2. -6
3. 12
4. -4
-6
1. x2+y2-2x = 0
2. x2+y2-8x = 0
3. x2+y2 =1
4. x2+y2-2x+1= 0
x<sup>2</sup>+y<sup>2</sup>-2x+1= 0
1. 4
2. 2√2
3. 4√2
4. 8
4
1. t1= t2
2. t1t2 = -1
3. t1t2=2
4. t1 = -t2
t<sub>1</sub> = -t<sub>2</sub>
1. y2=-r2x/a
2. x2=-r2y/a
3. y2= r2x/a
4. x2= r2y/a
y<sup>2</sup>=-r<sup>2</sup>x/a