Answers

2014-05-23T18:02:58+05:30
X²/16 + y²/9 = 1
compare with x²/a² + y²/b² = 1
a = 4 ; b = 3
e = (1 - b²/a²)^1/2
e = √7/4
foci = (ae,0)
      = (√7,0)
radius = {(√7-0)^2 + (3-0)^2}^1/2 
          = 4

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