∫x/(x^2-x+1)dx用凑微分法怎么求?
来源:学生作业帮 编辑:大师作文网作业帮 分类:数学作业 时间:2024/11/10 16:47:34
∫x/(x^2-x+1)dx用凑微分法怎么求?
x/(x^2-x+1) = (x -1/2) /(x^2-x+1) + (1/2) /(x^2-x+1)
∫(x -1/2) /(x^2-x+1) dx 凑微分,u = (x^2-x+1)
= (1/2)∫du / u = (1/2) lnu + C = (1/2) ln (x^2-x+1) + C
∫(1/2) /(x^2-x+1) dx = (1/2)∫dx / [(x-1/2)² + 3/4] 凑微分,v=(x-1/2)
= (1/2) ∫dv / (v² + 3/4) = (1/2) * (2 /√3) arctan(2v /√3) + C
= 1/√3 * arctan[(2x-1) /√3] + C
原式 = (1/2) ln (x^2-x+1) + (1 /√3) * arctan[(2x-1) /√3] + C
∫(x -1/2) /(x^2-x+1) dx 凑微分,u = (x^2-x+1)
= (1/2)∫du / u = (1/2) lnu + C = (1/2) ln (x^2-x+1) + C
∫(1/2) /(x^2-x+1) dx = (1/2)∫dx / [(x-1/2)² + 3/4] 凑微分,v=(x-1/2)
= (1/2) ∫dv / (v² + 3/4) = (1/2) * (2 /√3) arctan(2v /√3) + C
= 1/√3 * arctan[(2x-1) /√3] + C
原式 = (1/2) ln (x^2-x+1) + (1 /√3) * arctan[(2x-1) /√3] + C
∫x/(x^2-x+1)dx用凑微分法怎么求?
凑微分法求积分 ∫e^2x*dx
不定积分中凑微分法求∫e^x乘以sin(e^x+1)dx
∫X/(根号下2一X^2)dX=?用凑微分法
用换元法中的凑微分法计算积分∫x^3/(1+x^2)dx
∫1/(根号下9一X^2)dX用凑微分法
求微分 (x^n * e^-x)dx
怎么用凑微分法啊? 比如这个 ∫1/(1+x)dx 书上写1/(1+x)与1/x只是分母有差别,所
用凑微分法解答微分符号 [e^(2x)dx] / e^(4x)+3(1/2倍根号3)*arctan[e^(2x)/根号3
求微分sin^2x*cos^5x*dx
求微分1/(a^2+x^2 ) dx=求微分公式如何代入
用换元法中的凑微分法计算积分∫1/(e^x+e^-x)dx