If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( n )
n = 0
n = 0
n = 0
n in (-oo:0) U (0:+oo)
4 = 16/n // - 16/n
4-(16/n) = 0
4-16*n^-1 = 0
-16*n^-1 = -4 // : -16
n^-1 = 1/4
-1 < 0
1/(n^1) = 1/4 // * n^1
1 = 1/4*n^1 // : 1/4
4 = n^1
n = 4
n = 4
| 5x-3(x-3)=-4+5x-11 | | 5=2t+3 | | -9(u+1)=2u+23 | | 10-10p=-7p-8-5p | | log[2](4x^2-2x-2)=2 | | x^2(k+1)x+k+4=0 | | X(5+14)=3 | | 2-3lnx=1 | | -5f-10=-7f+10 | | 80+4x+4=10x+6 | | 0=-16t^2+32t-15 | | 4-4n=4 | | log[2](x-1)+log[2](4x+2)=2 | | 8j-6=7j | | 4=2s-6 | | -3y-4=-y+8 | | 2x-2+2x=46 | | x=486.40-.25y | | -3+2g=1+6g | | 5x-5-7x=-11 | | 20j-21=19j-25 | | (a+b)(x-y)= | | 11c=7 | | 6w^2+11w=35 | | -7r-30=5(6-2r)-7r | | 1-6x=9-7 | | 25x+40=125-5x | | 2x^2+17h+21= | | 5x-9+2=6x+10 | | 6x-8=94-11x | | (n-2)(n+6)=-15 | | -4=-6x+7x+4 |