Q: If e and e1 are the eccentricities of the hyperbola xy = c2 and x2 – y2 = c2, then e2 + e12 is equal to
(A) 1
(B) 4
(C) 6
(D) 8
Click to See Answer :
Ans: (B)
Sol: e = √2 , e1 = √2
⇒ e2 + e12 = 4.
Hence (B) is the correct answer.
Science and Education
Q: If e and e1 are the eccentricities of the hyperbola xy = c2 and x2 – y2 = c2, then e2 + e12 is equal to
(A) 1
(B) 4
(C) 6
(D) 8
⇒ e2 + e12 = 4.
Hence (B) is the correct answer.