Lecture no.4 important results on complex number

prove 3=0

Math magic trick/four digits number tricks

solve x!=x^2-x

0/1=?,0/0=?,1/0=? /indeterminate forms/math

solve the differential equations dy/dx=e^x-y

Lecture no.7 prove that Z1-Z2*=Z1*-Z2*

Lecture no.6 prove that zˉz=x^2+y^2, Z1+Z2=z+ˉz

Lecture no.5 prove that Z-Z=2iy,Z+Z/2=x=Re(z),Z-Z/2i=y=im(z)

Lecture no.4 important results on complex number

Lecture no 3 operation on complex number

Lecture no.2 key points of complex number/complex analysis

Lecture no.8 solve the Differential equation dx/dt-=2x given that t=0 , x=4