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Fid the differential equation of all the...

Fid the differential equation of all the parabolas with latus rectum `'4a '` and whose axes are parallel to x-axis.

A

one

B

four

C

three

D

two

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The correct Answer is:
D
Equation of all parabola, whose axiis is parallel to X-axis and have latusrectum 4a, is `(y-K)^(2)=4a(x-h)^(2)` here, we have two effective constant, K and h. so, we have to differentiate it twice. Hence, order of differential equation is 2.
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