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Question -

Find the equation of a curve passing throughthe origin given that the slope of the tangent to the curve at any point (x, y)is equal to the sum of the coordinates of the point.



Answer -

Let F (x, y)be the curve passing through the origin.

At point (x, y), theslope of the curve will be

According to the given information:

This is a linear differential equation of the form:

The general solution of the given differential equation isgiven by the relation,

Substituting in equation (1), we get:

The curve passes through the origin.

Therefore, equation (2) becomes:

1 = C

⇒ C = 1

Substituting C = 1 in equation (2), we get:

Hence, the required equation of curvepassing through the origin is

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