Mathematics · important
Purely real and purely imaginary conditions for JEE
Representation of complex numbers in the form a+ib and their representation in a plane
Formula
\(z\text{ is real }\iff \Im(z)=0;\quad z\text{ is purely imaginary }\iff \Re(z)=0\)
Variables: \(z=a+ib\)
Classification of complex numbers.