If a force given by a^i+b^j acts on an object is displaced by c^i+d^j, the work done on the object is:
If a, b, c, d are in G.p., prove that :
(i) (a2+b2),(b2+c2),(c2+d)2 are in G.P.
(ii) (a2−b2),(b2−c2),(c2−d)2 are in G.P.
(iii) 1a2+b2,1b2+c2,1c2+d2 are in G.P.