If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( r )
r^3 = 0
r^3 = 0
r^3 = 0
1*r^3 = 0 // : 1
r^3 = 0
r = 0
r in (-oo:0) U (0:+oo)
5/(r^3) = 0
5*r^-3 = 0 // : 5
r^-3 = 0
r należy do O
r belongs to the empty set
| 13m-893=650 | | 0.5(4a+6b)= | | 12w-5w=35 | | 12w-5w=15 | | (2x+10)(9x-9)= | | 5y-4=31 | | 2(7-2-1)+5-2=-38+-2 | | C=0.5w | | 3/7X-4/5=2X | | 5(4x+4)-6=-6(40x-30) | | 4c+6+2c=25 | | Tk=(2k-1)(2k-1)(2k-1) | | fx=15x | | 2(7m-1)+5m=-38+m | | 1/2(x-3)=2y | | Tk=(2k-1)2 | | -6(2x-4)=-12x+24 | | 8-2(7X-5)=6x-4 | | 12(x+6)=9(x+8) | | 3x-26=2x+29 | | Tk=(2k-1) | | h(x)=2x-1 | | 3(7x+1)=2x | | 9x+7=7x+31 | | X=-y^2+2y-1 | | 25.1=3.14d | | 5x+25=4x | | 0.13(x+15)=24.96 | | 10x+180=9x+180 | | (25x^2+20xy+16x^2)(5x-4y)= | | 6x-24+4x=180 | | 2x/14=10 |