birdwatcher (birdwatcher) wrote,
birdwatcher
birdwatcher

Как обычно

Задача на тему "Определение производной".

Inflating a balloon. The volume V=(4/3)πr3 of a spherical balloon changes with the radius
(a) At what rate does the volume change with respect to the radius when r=2ft?
(b) By approximately how much does the volume increase when the radius changes from 2 to 2.2ft?

Дочка: в каком смысле тут используется слово approximately? Почему бы не вычислить V(2.2) - V(2) с произвольной точностью?
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