f(x)= ax2
( 8 | 2 )
f ( x ) = a * 82 = 2
a = 1 / 32
f ( x ) = 1/32 * x2
f ( x ) = radius
A = r2 * π
A ( x ) = [ 1/32 * x2 ] 2 * π
A ( x ) = 1/32 2 * π * x 4
Stammfunktion
S ( x ) = ∫ 1/32 2 * π * x 4 dx
S ( x ) = 1/32 2 * π * x 5 / 5
S ( x ) = 0.00061 * x 5
V ( x ) = [ S ( x ) ] zwischen 3 und 8
V = 0.00061 * [ 8 5 - 35 ]
V = 19.84 cm3