" 13.If "z=((1+i)(2+i))/((3+i))," then "|z|" is "

If z=((1+i)(2+i))/((3+i)) find z^(-1) and barz .

" If "z=((1+i)(1+2i)(1+3i))/((1-i)(2-i)(3-i))" then the principal argument of "z"

If z = frac((1+i)(1+sqrt3i)^2)(1-i) , find |z| , arg z and barz .

If z_(1)= 4-3i and z_(2) = 3 + 9i " then " z_(1) -z_(2) is

If z_(1)= 4-3i and z_(2) = 3 + 9i " then " z_(1) -z_(2) is

If z_(1)=2+3i and z_(2)=3+2i , then |z_(1)+z_(2)| is equal to

If z_(1),z_(2),z_(3) are the vertices of an equilational triangle ABC such that |z_(1)-i|=|z_(2)- i| = |z_(3)-i|, then |z_(1)+z_(2)+z_(3)| equals to

If z_(1),z_(2),z_(3) are the vertices of an equilational triangle ABC such that |z_(1)-i|=|z_(2)- i| = |z_(3)-i|, then |z_(1)+z_(2)+z_(3)| equals to

if z_(1)=3+i and z_(2) = 2-i, " then" |(z_(1) +z_(2)-1)/(z_(1) -z_(2)+i)| is

if z_(1)=3+i and z_(2) = 2-i, " then" |(z_(1) +z_(2)-1)/(z_(1) -z_(2)+i)| is