1. 4x2 - 4xy + y2 - 8x + 4y + 4 = 0
2. 4x2 - 4xy + y2 - 8x + 4y + 4 = 0
3. 4x2 + 5xy + y2 + 8x + 4y + 4 = 0
4. 4x2 - 4xy + y2 - 8x - 4y + 4 = 0
4x<sup>2</sup> - 4xy + y<sup>2</sup> - 8x + 4y + 4 = 0
1. x + my + am3 = 0
2. x-my +am2 = 0
3. x + my - am2 = 0
4. y + mx + am2 = 0
x + my - am<sup>2</sup> = 0
1. x=2y
2. y=2x`
3. x=4y
4. y=4x
y=2x`
1. 1
2. 2
3. 3
4. P
3
1. r = 2 sinθ
2. r2 cos2θ = 1
3. r(4 cosθ + 5 sinθ) = 3
4. 5 = r (1 + √2 cosθ)
r = 2 sinθ
1. 1
2. 0
3. does not exist
4. infinity
0
1. 0
2. -1
3. 1
4. - 1/2
-1
1. R
2. R - {-2}
3. R - {-1}
4. R -{-1, -2}
R - {-1}
1. cos x
2. 4cos x
3. sin x
4. 4 sin x
4cos x<br>
1. 1/(1+x)2
2. -[1/(1+x)2]
3. 1/1+x2
4. 1/1-x2
-[1/(1+x)<sup>2]</sup>