f为连续函数 证明f(cosx)dx=f(sinx)dx 左右边的范围都是0到π /2
人气:262 ℃ 时间:2019-08-20 12:42:44
解答
I = ∫[0,π/2] f(cosx) dx 换元,令 u= π/2-x,dx = (﹣1)du
= ∫[π/2,0] f(sinu) (-1)du
= ∫[0,π/2] f(sinu) du
= ∫[0,π/2] f(sinx) dx
推荐
- 设f(x)在【0,1】上连续.证明∫(π/2~0)f(cosx)dx=∫(π/2~0)f(sinx)dx
- 若函数f(x)在【0,1】上连续,证明∫f(sinx)=∫f(cosx) 0
- 证明:若函数f(x)在[0,1]上连续,则∫xf(sinx)dx=π/2∫f(sinx)dx (上限 π,下限 0)
- 计算定积分I=∫(0→π)f(sinx)/[f(sinx)+f(cosx)]*dx,其中f(x)为连续函数,且f(sinx)+f(cosx)不等于0
- 设f(x)为连续函数,证明:∫(0,π)f(丨cosx丨)dx=2∫(0,π/2)f(sinx)dx
- 丙酮酸产生CO2和水的过程只能在线粒体内进行?
- 我们应当吃许多健康的食品 用英语怎么说
- The sale usually takes place outside the house,with the audience___on benches,chairs or boxes.
猜你喜欢