Answer:
The answer is (d) ⇒ eccentricity = 6 , hyperbola , directrix x = 3/2
Step-by-step explanation:
∵ r = ek/(1 ± ecosФ)
∵ r = 9/(1 + 6cosФ)
∴ e = 6 ⇒ eccentricity = 6
∵ e > 1
∴ The conic is hyperbola
∵ ek = 9
∴ k = 9/6 = 3/2
∴ The directrix x = 3/2
x = 9
0.09+27/100=x/100+27/100
0.09=x/100
9=x
7 + 8(2r - 9)
mutiply the bracket by 8
(8)(2r)= 16r
(8)(-9)= -72
7+16r-72
7-72+16r ( rearranging)
answer:
-65+16r or 16r-65