((1+2i)/(1-i))" lies in "

In Argand plane , the quadrant in which (1 + 2i)/(1 -i) lies is

In which quadrant of the complex plane ,the point (1+2i)/(1-i) lies ?

If z_(1)=sqrt(3)+i sqrt(3) and z_(2)=sqrt(3)+i then the complex number ((z_(1))/(z_(2))) lies in the

(1+2i)/(1-(1-i)^2)

If the point z = (1+i) (1+2i)(1+3i)…(1+10i) lies on a circle with centre at origin and radius r, then r^(2) =

In Argand plane, the point corresponding to ((1-isqrt3)(1+i))/((sqrt3+i)) lies in which quadrant?