hi,
i am having difficulty trying to find a change of variables to solve this partial differential equation
\frac{\partial f}{\partial t} = t^\gamma \frac{\partial ^2 f}{\partial x^2}
not sure how to pluck out a change of variables by looking at the equation as its definately not obvious to the...
hey guys,
just wondering if i did this correctly
a spherical balloon is to be filled with water so that there is a constant increase in the rate of its surface area of 3cm2/sec .
a) Find the rate of increase in the radius when the radius is 3cm.
b) Find the volume when the volume is...