1.

The subnormal at any point of a curve is of constant length '8'. Then the differential equation of the family of curves is

Answer»

`(dy)/(DX) = 8`
`y((dy)/(dx)) = 8`
`ysqrt(1((dy)/(dx))^(2)) = 8`
`ysqrt(1((dy)/(dx))^(2)) = 8dy//dx`

Answer :B


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