If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( c )
c = 0
c = 0
c = 0
c in (-oo:0) U (0:+oo)
9/2 = 1/c // - 1/c
9/2-(1/c) = 0
9/2-c^-1 = 0
-1*c^-1 = -9/2 // : -1
c^-1 = 9/2
-1 < 0
1/(c^1) = 9/2 // * c^1
1 = 9/2*c^1 // : 9/2
2/9 = c^1
c = 2/9
c = 2/9
| Y=5(x-6) | | X-5-2=2 | | -5b+20=-2(-3-B) | | Y=6(x-3) | | 4x-3y+z=12 | | 1/2ln4x=3 | | 45q^3-20q= | | 6/11=x/5 | | 8x^2+9-4=0 | | 32-8y^2= | | 5=3x^2-4x-2 | | 47/8-21/4 | | f(5)=3x^2-4x-2 | | 5(x+5)+3=9x+5(x+3) | | F(x)=-2x^2-17x+39 | | 7(a-2)=-14+8a | | h=-16t+128t | | y=(-2x^3)-(4x^2)-x | | -6(n-7)=40-4n | | y=83+2x | | 3x+2=(-6)-x | | -9x^2-24x-16=0 | | u=7(18+32)+8(6+1) | | y=2x+83 | | 14/9x | | c=2*3.141*r | | log(x-3)+log(x+1)=-1 | | u=(3n+32)+8(n+1) | | 5.1=9.1-0.8x | | -y+10=0 | | u=7(12+35)+9(6+1) | | 41.03=8g+3.83 |