1. ax+by = 0
2. bx+ay = 0
3. y-x = 0
4. x+y = 0
y-x = 0
1. 15/13
2. 12/13
3. 5/13
4. 7/13
15/13
1. 2x2-xy-y2+5x+y+2=0
2. 2x2-xy-y2-5x-y+2=0
3. x2-xy-2y2-5x-y-2=0
4. 2x2-xy-y2+5x+y-2=0
2x<sup>2</sup>-xy-y<sup>2</sup>-5x-y+2=0
1. π/4
2. π/3
3. π/6
4. π/2
π/2
1. 0
2. π/2
3. π/3
4. π/4
π/4
1.
2.
3.
4.
1. x+y = 0
2. x-y = 0
3. x+y = pqr
4. x-y = pqr
x-y = 0
1. 0
2. 1
3. e
4. 1/e
0
1. 100
2. 50
3. 0
4. 200
200
1. 2/3
2. 0
3. 1/3
4. -2/3
0