B.(i)
(
1 ,1
2)
,√
21
2(ii)(
−3
2, 1)
,√
41
2(iii)(
0 ,− 1
2)
,√
13
2.C.x+y− 2 − 2
√
2 =0, x−y+ 2 + 2√
2 = 0
They intersect at (0, 2 +√
2).D.Centre (1, 0), radius 1. Tangent isx−
√
(^3 y+^1 =0 with intercepts (−1, 0) and
0 ,1
√
3)
.7.3.8 Parametric representation of curves
(i) x^2 +y^2 = 9 (ii)(x− 1 )^2
4+(y− 3 )^2 = 1(iii) x= 2 (y+ 2 )^2 (iv) xy= 6
(v) x= 1 − 2 y^2