证明:(∫[a,b]f(x)g(x)dx)^2
人气:229 ℃ 时间:2020-02-04 07:00:47
解答
在闭区域D=[a,b]*[a,b]上,有(f(x)g(y)-f(y)g(x))^2>=0,做二重积分有
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