求此题的中文解法,不需要解题格式,只希望数学高手能讲的明白一些
求此题的中文解法,不需要解题格式,只希望数学高手能讲的明白一些
Let f and g be two continuous functions such that f(x) 大于等于 g(x) for all x属于[a; b].
Show that the area A of the region bounded by the curves y = f(x), y = g(x), and
the lines x = a, x = b, is
A =积分(a到b)[f(x) -g(x)]dx