If pth,qth,rth terms of a G.P. are the positive numbers a,b and c, then the angle between the vectors (loga2)^i+(logb2)^j+(logc2)^k and (q−r)^i+(r−p)^j+(p−q)^k is

If pth,qth,rth terms of a G.P. are the positive numbers a,b and c, the

1.	If pth,qth,rth terms of a G.P. are the positive numbers a,b and c, then the angle between the vectors (loga2)^i+(logb2)^j+(logc2)^k and (q−r)^i+(r−p)^j+(p−q)^k is
Answer» If $p^{t h}, q^{t h}, r^{t h}$ terms of a $G . P .$ are the positive numbers $a, b$ and $c,$ then the angle between the vectors $(log a^{2})^i + (log b^{2})^j + (log c^{2})^k$ and $(q - r)^i + (r - p)^j + (p - q)^k$ is