- #1
stonecoldgen
- 109
- 0
So they give me the equation 3y2=x(1-x)2
The idea is to find the surface area of the volume obtained by rotating around both axes.
So let's start with a rotation around the x-axis, I decided to rewrite the equation as:
y=√(x(1-x2)/3)
I know that the surface area for a parallel rotation is S=∫2∏r√((dr/dx)2+1)
and I know the derivative of the function, so I end up with:
S=∫2∏r√2(1-3x2)/(6√(x-x3)/3))+1)
How the HELL am I supposed to integrate that?
The idea is to find the surface area of the volume obtained by rotating around both axes.
So let's start with a rotation around the x-axis, I decided to rewrite the equation as:
y=√(x(1-x2)/3)
I know that the surface area for a parallel rotation is S=∫2∏r√((dr/dx)2+1)
and I know the derivative of the function, so I end up with:
S=∫2∏r√2(1-3x2)/(6√(x-x3)/3))+1)
How the HELL am I supposed to integrate that?