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Question: Answered & Verified by Expert
If the eccentricity of a conic satisfies the equation 2x3+10x-13=0, then that conic is
MathematicsHyperbolaTS EAMCETTS EAMCET 2018 (04 May Shift 1)
Options:
  • A a circle
  • B a parabola
  • C an ellipse
  • D a hyperbola
Solution:
1650 Upvotes Verified Answer
The correct answer is: a hyperbola

Given equation is 2x3+10x-13=0.

Given that the eccentricity of a conic satisfies the equation i.e., the eccentricity is any one of the roots.

Now, 2x3+10x-13=0.

2x3+10x=13

xx2+5=132

xx2+5=6.5

By verification:

Put x=00(0+5)=6.5

Put x=1112+5=6.5

6=6.5

Put x=2222+5=6.5

29=6.5

18=6.5

 The value of x lies in between 1, 2 i.e., the

eccentricity is greater than one.

 The conic is hyperbola.

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