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AP EAMCET2011MathematicsQuadratic Equation

If a>0 and b^2-4 a c=0 , then the curve y=a x^2+b x+c

Options

  1. Acuts the x -axis
  2. Btouches the x -axis and lies below it
  3. Clies entirely above the x -axis
  4. Dtouches the x -axis and lies above it

Correct answer

D. touches the x -axis and lies above it

Step-by-step solution

Given, y=a x^2+b x+c Since, a>0 and b^2-4 a c=0 Therefore, given curve touch the x -axis and lies above it.

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