Let `k(x)=int((x^2+1)dx)/((x^3+3x+6)^(1/3))a n dk(-1)=1/(2^(1/3))` . Then the value of `k(-2)` is____

Let k(x)=int((x^(2)+1)/((x^(3)+3x+6)^((1)/(3)))dx and k(-1)=(1)/(2^((1)/(3))), the value of k(-2) is

"Let " k(x)=int((x^(2)+1)dx)/(root(3)(x^(3)+3x+6)) " and " k(-1)=(1)/(root(3)(2)). " Then the value of " k(-2) " is "-.

If x=1+2^(1/3)+2^(2/3) , then the value of x^3- 3x^2- 3x -1 is____

int(x^(2)+3x-1)/((x+1)^(2))dx

int(3x^(2)+1)/((x^(2)-1)^(3))dx

int (1+3x^2)/(x(1+x^2)) dx

If int _(0)^(oo) (x ^(3))/((a ^(2)+ x ^(2)))dx = (1)/(ka ^(6)), then find the value of k/8.

int(x+1)sqrt(1-x-x^(2))dx=-(1)/(3)(1-x-x^(2))^(3/2)+A+c .Then the value of A is