Let x 0, constant a>e. Proof: (a +)"<*
Take the outer tangent normal cone of a sphere with radius r, ask the height h of this cone, its volume is minimum, and ... 查看全部
Let the plane figure consist of x2+y2≤2 x and, determined by, find the volume of the rotating body obtained by the rotat... 查看全部
Let a particular solution of the second order linear differential equation with constant coefficients y"+ay'+By =yex be=... 查看全部
Find the particular solution of the differential equation (x2-1)dy +(2xy-cos x)dx =0 satisfying the initial condition y(... 查看全部
Find the curve1 y 1+2(>0) inflection point.
Let f(x)=1+x2,x≤0, to calculate(x-2)dx.x>0,