# Solve the differe

Given, To Find: Find the solution when y = 1 and x = 1

Explanation: It can be written as:  …(i)

Let, F(x, y) = Now, put x = λx and y = λy in F(x, y) Taking λ as common from both numerator and denominator We know, If the degree of the λ in function F(x, y) then it is said Homogenous function

So, the given differential equation is Homogenous differential equation.

Put y = vx in equation(i)

Differentiation y w.r.t x , we get …(iii)

Now, Compare the equation (i) and (iii), we get Taking x2 as common from both numerator and denominator     Integrating both sides, we get Let v2 + 1 = t

On differentiating we get,

2v dv = dt, So log t = - log x + log C

Putting the value of t , we get

Log|v2 + 1| + log|x| = log|c|

log|x(v2 + 1)| = log|C|

Now, putting back the value of v = y/x ,   - - - (iv)

When, x = 1 and y = 1

(1)2 + 1 = C(1)

C = 2

Put the value of C in equation (iv)

y2 + 1 = x(2)

y2 = 2x - 1

Hence, y2 = 2x - 1 is the solution of given differential equation.

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