(a b)^2=?
If 1, w, (o2 are the cube roots of unity, find (2 + w +w2)6 + (3+w+w2)6.
A line with cosines proportional to 2,7−5 drawn to intersect the lines x−53=y−7−1=z+21;x+3−3=y−32=z−64 .Find the co- ordinates of the points of intersection and the length intercepted on it.