Consider the parabola whose equation is ...

Consider the parabola whose equation is` y = x^2 - 4x` and the line `y = 2x - b`. Then whichfollowing is/are correct ?

A

For b = 9 the line is a tangent to the parabola

B

For b = 7 the line cuts the parabola in A and B such that the `/_AOB` is a right angle when ‘O’ is the origin

C

For some `b in R` the line cuts the parabola in C and D such that x-axis bisects the `/_COD`

D

For `b gt 9` the line passes outside the parabola

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The correct Answer is:

A, B, D

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