# Math Help - DIFFERANTIAL EQUATION! i badly need help

1. ## DIFFERANTIAL EQUATION! i badly need help

can any one help me to solve this problem?

Differential Equation of the Circles tangent to x-axis.

2. Originally Posted by kayumanggi
can any one help me to solve this problem?

Differential Equation of the Circles tangent to x-axis.
Circles with the required property have the form $(x - a)^2 + (y - r)^2 = r^2$. So get dy/dx from this equation using implicit differentiation and impose the boundary condition y(0) = r.