paulandigi
10.10.2019 •
Mathematics
Which expression is equivalent to mc017-1.jpg?
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Ответ:
where
pi : 3.14 a constant
r : raduis
surface area is the change of volume with respect to raduis
volume = 4/3 pi r^3
dvolume/dr = 4 pi r^2
you can prove the identity with double integration in spherical coordinates or volumes of revolutions and polar coordinates