x21x232设ⅹ=tanθ,则dⅹ=sec2θdθ.∴∫[x2/(1+x2)^(3/2)]dⅹ=∫(tan2θ/sec3θ)·sec2θdθ=∫(sin2θcosθ)dθ=∫sin2θd(sinθ)=(1/3)sin3θ+C=(1/3)·[x/√(1+x2)]3+C。2,x123带步骤解方程(x-1)2=3x-1=±√3x=1-√3,x=1+√3x-1=-3^1/2或x-1=-3^1/2x=3^1/2+1或x=1-3^1/2再看看别人怎么说的。(x-1)2=3x-1=√3或x-1=-√3x=1+√3
x21x232设ⅹ=tanθ,则dⅹ=sec2θdθ.∴∫[x2/(1+x2)^(3/2)]dⅹ=∫(tan2θ/sec3θ)·sec2θdθ=∫(sin2θcosθ)dθ=∫sin2θd(sinθ)=(1/3)sin3θ+C=(1/3)·[x/√(1+x2)]3+C。2,x123带步骤解方程(x-1)2=3x-1=±√3x=1-√3,x=1+√3x-1=-3^1/2或x-1=-3^1/2x=3^1/2+1或x=1-3^1/2再看看别人怎么说的。(x-1)2=3x-1=√3或x-1=-√3x=1+√3
x21x232设ⅹ=tanθ,则dⅹ=sec2θdθ.∴∫[x2/(1+x2)^(3/2)]dⅹ=∫(tan2θ/sec3θ)·sec2θdθ=∫(sin2θcosθ)dθ=∫sin2θd(sinθ)=(1/3)sin3θ+C=(1/3)·[x/√(1+x2)]3+C。2,x123带步骤解方程(x-1)2=3x-1=±√3x=1-√3,x=1+√3x-1=-3^1/2或x-1=-3^1/2x=3^1/2+1或x=1-3^1/2再看看别人怎么说的。(x-1)2=3x-1=√3或x-1=-√3x=1+√3
x21x232设ⅹ=tanθ,则dⅹ=sec2θdθ.∴∫[x2/(1+x2)^(3/2)]dⅹ=∫(tan2θ/sec3θ)·sec2θdθ=∫(sin2θcosθ)dθ=∫sin2θd(sinθ)=(1/3)sin3θ+C=(1/3)·[x/√(1+x2)]3+C。2,x123带步骤解方程(x-1)2=3x-1=±√3x=1-√3,x=1+√3x-1=-3^1/2或x-1=-3^1/2x=3^1/2+1或x=1-3^1/2再看看别人怎么说的。(x-1)2=3x-1=√3或x-1=-√3x=1+√3
x21x232设ⅹ=tanθ,则dⅹ=sec2θdθ.∴∫[x2/(1+x2)^(3/2)]dⅹ=∫(tan2θ/sec3θ)·sec2θdθ=∫(sin2θcosθ)dθ=∫sin2θd(sinθ)=(1/3)sin3θ+C=(1/3)·[x/√(1+x2)]3+C。2,x123带步骤解方程(x-1)2=3x-1=±√3x=1-√3,x=1+√3x-1=-3^1/2或x-1=-3^1/2x=3^1/2+1或x=1-3^1/2再看看别人怎么说的。(x-1)2=3x-1=√3或x-1=-√3x=1+√3
x21x232设ⅹ=tanθ,则dⅹ=sec2θdθ.∴∫[x2/(1+x2)^(3/2)]dⅹ=∫(tan2θ/sec3θ)·sec2θdθ=∫(sin2θcosθ)dθ=∫sin2θd(sinθ)=(1/3)sin3θ+C=(1/3)·[x/√(1+x2)]3+C。2,x123带步骤解方程(x-1)2=3x-1=±√3x=1-√3,x=1+√3x-1=-3^1/2或x-1=-3^1/2x=3^1/2+1或x=1-3^1/2再看看别人怎么说的。(x-1)2=3x-1=√3或x-1=-√3x=1+√3