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Grade: 12th Pass
        From a point (sin k,cos k),three normal can be drawn to the parabola y^2=4ax(a>0) then then value of a lies in the interval:
1)(2,5/2)
2)(0,1/2)
3)(2,3)
4)(1/2,3/2)
5 years ago

Answers : (1)

Sourabh Singh
IIT Patna
askIITians Faculty
2109 Points
							Write the equation of normal and satisfy at this point .You will get conditions on the value such that three real roots must exist .
Use h>2a condition for real roots.
3 years ago
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