Since, a,b and c form a geometric progression ∴a=a,b=ar,c=ar2 Therefore, given line becomes ax+ary+ar2=0 ⇒ x+ry+r2=0 ⇒ x=−ry−r2 .......(i) On putting x=−ry−r2 in given curve x+2y2=0, we get −ry−r2+2y2=0 ⇒ 2y2−ry−r2=0 ∴ Sum of ordinates =