Ex 11.4

Chapter 11 Class 11 Conic Sections
Serial order wise

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### Transcript

Ex 11.4, 7 Find the equation of the hyperbola satisfying the given conditions: Vertices (Β±2, 0), foci (Β±3, 0) Given Vertices are (Β±2, 0) Hence, vertices are on the x-axis β΄ Equation of hyperbola is of the form ππ/ππ β ππ/ππ = 1 Now, Co-ordinate of vertices = (Β±a, 0) & Vertices = (Β±2, 0) β΄ (Β±a, 0) = (Β±2, 0) Hence a = 2 Also, Given coordinates of foci = (Β±3, 0) And we know that co-ordinates of foci are (Β±c, 0) β΄ (Β±c, 0) = (Β±3, 0) c = 3 Also c2 = a2 + b2 Putting a = 2, c = 3 32 = 22 + b2 9 = 4 + b2 5 = b2 b2 = 5 Also, Given coordinates of foci = (Β±3, 0) And we know that co-ordinates of foci are (Β±c, 0) β΄ (Β±c, 0) = (Β±3, 0) c = 3 Also c2 = a2 + b2 Putting a = 2, c = 3 32 = 22 + b2 9 = 4 + b2 5 = b2 b2 = 5 Thus, Equation of hyperbola π₯^2/π^2 β π¦^2/π^2 = 1 π₯^2/2^2 β π¦^2/5 = 1 π^π/π β π^π/π = 1