If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( i )
-4*i = 0
-4*i = 0
-4*i = 0
-4*i = 0 // : -4
i = 0
i in (-oo:0) U (0:+oo)
(-(8*i)-1)/(-4*i) = 0
(-8*i-1)/(-4*i) = 0
-8*i-1 = 0 // + 1
-8*i = 1 // : -8
i = 1/(-8)
i = -1/8
i = -1/8
| d=160/40 | | d=63/21 | | l(2x+1)l=11 | | -16x^2+110x+5=135 | | -1/5d-1=12] | | x+89=5x | | 3y-(5-9y)=-41 | | 4b=18 | | 4(3.14)r^2=3 | | 21x-35xy/3-5y=28 | | 7x-13x+x-9x= | | 0.16y+0.07(y+2000)=2210 | | 2x+8+7x-2=90 | | -4x-11=13 | | X^2+(k-6)X+1=0 | | 0.25f=8 | | 7x-14x+x-9x= | | 14x=15x-1 | | 1000x-1x=0 | | (64^1/3) | | 12x+17x-8+3=-3x+3-8 | | F=HS | | 7n+15=-33n+15 | | 3(5z-1)-5(z+1)=3(z+1) | | (2ln(x)−3)/(x^3)=0 | | 15(v+1)-3v=4(3v+3)-20 | | 4x-20=3y-20 | | 2x^4+7x^3-2x^2-19x-12=0 | | (√32x^9y^2)/(√2xy^-2) | | -7(4x-8)= | | -8m^2=-368 | | X=31+-1.5y |