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The equation of the line touching both the parabolas  and is  then the value of  is


Question ID - 153563 | Toppr Answer

The equation of the line touching both the parabolas  and is  then the value of  is

1 Answer - 5876 Votes

3537

Answer Key : (3) -

(3)

Equation of tangent in terms of slope of parabola  is

Eq.(i)is also tangent of

Then

Above equation must have equal roots,

Hence its discriminant must be zero

or

Form Eq. (i),



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