dx/(x-1)乘以(x-2)乘以(x-3)的不定积分
1个回答
展开全部
let
1/[(x-1)(x-2)(x-3)]≡A/(x-1)+B/(x-2)+C/(x-3)
=>
1≡A(x-2)(x-3)+B(x-1)(x-3)+C(x-1)(x-2)
x=1, A= 1/2
x=2, B= -1/2
x=3, C=1/2
∫ dx/[(x-1)(x-2)(x-3)]
=(1/2)∫ [1/(x-1) -1/(x-2)+1/(x-3)] dx
=(1/2)ln|(x-1)(x-3)/(x-2)| + C
1/[(x-1)(x-2)(x-3)]≡A/(x-1)+B/(x-2)+C/(x-3)
=>
1≡A(x-2)(x-3)+B(x-1)(x-3)+C(x-1)(x-2)
x=1, A= 1/2
x=2, B= -1/2
x=3, C=1/2
∫ dx/[(x-1)(x-2)(x-3)]
=(1/2)∫ [1/(x-1) -1/(x-2)+1/(x-3)] dx
=(1/2)ln|(x-1)(x-3)/(x-2)| + C
追问
答案不是这个 分母是(x-2)的平方
追答
let
1/[(x-1)(x-2)(x-3)]≡A/(x-1)+B/(x-2)+C/(x-3)
=>
1≡A(x-2)(x-3)+B(x-1)(x-3)+C(x-1)(x-2)
x=1, A= 1/2
x=2, B= -1
x=3, C=1/2
∫ dx/[(x-1)(x-2)(x-3)]
=(1/2)∫ [1/(x-1) -2/(x-2)+1/(x-3)] dx
=(1/2)ln|(x-1)(x-3)/(x-2)^2| + C
杭州彩谱科技有限公司
2020-07-03 广告
2020-07-03 广告
测色仪L、a、b、c、h的意思,L代表明暗度(黑白),a代表红绿色,b代表黄蓝色,c表示彩度(色彩饱和的程度或纯粹度),h表示色调角。测色仪,广泛应用于塑胶、印刷、油漆油墨、纺织、印染服装等行业的颜色管理领域,根据CIE色空间的Lab,Lc...
点击进入详情页
本回答由杭州彩谱科技有限公司提供
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询