If `(3x)/((x-6)(x+a))=(2)/(x-6)+(1)/(x+a)` then `a=`

If (3x-6)/((x-6)(x+k))=2/(x-6)+1/(x+k) " then " k=

(2(x-3))/(x(x-6))<=(1)/(x-1)

(x-1)/(x-2)-(x-2)/(x-3)=(x-5)/(x-6)-(x-6)/(x-7)

If (x^(2)-2x-9)/((x^(2)+x+6)(x+1))=(2x-3)/(x^(2)+x+6)+(A)/(x+1) , then A is ___________.

Solve (2x-3)/(x-1)+1=(6x-x^(2)-6)/(x-1)

x^(3)-(1)/(x^(3))-6x+(6)/(x)

((1)/(x-3)-(3)/(x(x^(2)-5x+6)))

If d/(dx) {f(x)}=1/(1+x^2) then d/(dx){f(x^3)} is a) (3x)/(1+x^3) b) (3x^2)/(1+x^6) c) (-6x^5)/(1+x^6)^2 d) (-6x^5)/(1+x^6)

(x-1)/(3)+(2x+5)/(6)=(3x-6)/(9)-(2x-5)/(2)