If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( f )
f = 0
f = 0
f = 0
f in (-oo:0) U (0:+oo)
2/f = -1 // + 1
2/f+1 = 0
2*f^-1 = -1 // : 2
f^-1 = -1/2
-1 < 0
1/(f^1) = -1/2 // * f^1
1 = -1/2*f^1 // : -1/2
-2 = f^1
f = -2
f = -2
| 117=(.5)(x+3) | | -3+5y=-18 | | 7ln(-x+1)+3=0 | | 14=-2(m+12) | | 117=(.5)(2x+14)(x+3) | | V(s)=s*3 | | 8x-10=-x-19 | | P(t)=-8+100 | | 117=(.5)(2x+14) | | 5=6-k | | 12a-7=23 | | 2x/3+1x/4+2/1=x | | 0=f-20/-2 | | 3x^2+6=165 | | =54f | | 5x^2(6x^2+5x-1)=0 | | 3(u+3)=-12 | | 20=3(u+3)+5 | | 7h-4=h+32 | | 5x-17+2x+10=180 | | 6m/4=34 | | 12=4(n-17) | | 17.5=-6.5(3x-6) | | -2x^2+12x-9=0 | | .04=.013(t)+0.025(3) | | 3(w-7)=5w+11 | | 180=220-x | | 3w=1 | | p-7/3=1 | | 7m=3m+42 | | 3a+3b+c=-27 | | 12x+7=14x-3 |