∫(3X^2一8X一1)/[(X一1)^3(X十2)]dX
∫(3X^2一8X一1)/[(X一1)^3(X十2)]dX
∫X/[X十根号(X^2一1)]dX=
∫[1/(1一X^2)][ln(1十X)/(1一X)]dX=
若不定积分∫f(X)dX=X^2十C,则∫Xf(1一X^2)dX=
化简求值:(X一3)(X一2)十(X一1)(X十3)一2(X平方一X十8)(其中X=6).
(1)(X一3)(X一2)十18=(X十9)(X十1) (2)(3X十4)(3X一4)<9(X一2
Z=(X^2一y)/(X十y),而y=2X一3,求dz/dx
分解因式(x十1)(x十2)(x十3)(x十6)一3x'2;3x(3x一2)一a(a十2)
∫(1十X^2)/[1十X^4]dX=
(X十2)(X一13)一16=(X十3)( )
计算:6x2一(2x一1)(3x一2)十(x十2)(x一2)一x(x十7)这题怎么做?
解方程 (1)4X^2一4X十1=8 (2)X^2十X一1=0 (3)X^2十6分之一x一3分之一=0