1-x √9-4x*2 的不定积分
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∫[2x/(x^2+x+1)]dx=∫[(2x+1)/(x^2+x+1)]dx-∫dx/(x^2+x+1)=ln|x^2+x+1|-∫dx/(x^2+x+1)considerx^2+x+1=(x+1/
再答:再答:再问:答案是这个
答:1.∫arcsinxdx可用分部积分原式=xarcsinx-∫x/√(1-x^2)dx=xarcsinx+√(1-x^2)+C2.∫e^(√x+1)dx换元,令√(x+1)=t,则x=t^2-1,
我的解答如下:换元法令x=3/2sint,t∈[-0.5π,0.5π]dx=3/2cost带入后得到∫(1-x)/[√(9-4x^2)]dx=∫(1-1.5sint)1.5costdt/3cost=∫
1/(x^4-x^2)=-1/x^2-1/[2(x+1)]+1/[2(x-1)]积分=1/x+(1/2)ln(1-x)-(1/2)ln(1+x)+C如果要写短些1/x-arctanhx+C(保证是对的
第一题:原式=2∫{x^2/[x(x-4)]}dx-∫{1/[x(x-4)]}dx =2∫[x/(x-4)]dx-(1/4)∫{(x-x+4)/[x(x-4)]}dx =2∫[(x-4+4)/(x
求不定积分1.∫[(1/x)√(x–1)]dx令√(x–1)=u,则x-1=u²,x=u²+1;dx=2udu;代入原式得:原式=2∫u²du/(u²+1)=2
1/(x+1)(x+2)(x+3)=1/(x+1)[1/(x+2)-1/(x+3)]=1/[(x+1)(x+2)]-1/[(x+1)(x+3)]=1/(x+1)-1/(x+2)-1/2[1/(x+1)
请问题目是x^2√(1+x^4)还是x^2/(1+x^4)再问:是根号再答:感觉你问的不能用初等函数函数表示,你确定题目是这样的,还是或许不用求原函数
∫x^2/√(1-x^2)dx=-∫-2x^2/2√(1-x^2)dx=-∫xd√(1-x^2)=-x√(1-x^2)+∫√(1-x^2)dx其中,解∫√(1-x^2)dx令x=sintdx=cost
令1/[(x-1)(x²+4x+9)]=A/(x-1)+(Bx+C)/(x²+4x+9)==>1=A(x²+4x+9)+(Bx+C)(x-1)1=Ax²+4Ax
设x=3sect,dx=3sect*tantdt,cost=3/x,t=arccos(3/|x|),tant=√[(sect)^2-1]=√(x^2/9-1)原式=∫sect*tantdt/(|tan
1/(1+x^2)d(1+x^2)=ln(1+x^2)+C
∫[(x-1)/(x^2+3)]dx=∫[x/(x^2+3)]dx-∫[1/(x^2+3)]dx=(1/2)∫[1/(x^2+3)]d(x^2+3)-(1/√3)∫{1/[(x/√3)^2+1]}d(
∫(x-1)/√(9-4x^2)dx=∫x/√(9-4x^2)dx-∫1/√(9-4x^2)dx=-1/8*∫1/√(9-4x^2)d(9-4x^2)-0.5*∫1/√[1-(2x/3)^2]d(2x
3次分部积分法解用!代表积分号=!(x^3-x+1)(1-cos2x)/2dx=(x^3-x+1)(x/2-sin2x/4)-!(3x^2-1)(x/2-sin2x/4)dx+c=-!(3x^2-1)