Let R={(P,Q) | P and Q are at the same distance from the origin} be a relation, then the equivalence class of (1,−1) is the set :
Let (x, y) be a pair of real number satisfying 56x+33y=−yx2+y2 and 33x–56y=xx2+y2. If |x| + |y| = pq (where p and q are relatively prime), then (6p – q)is ___
Let P = {(x,y) x2+y2=1,x,y∈R}. Then P is.
Let f(x,y)=√x2+y2+√x2+y2−2x+1+√x2+y2−2y+1+√x2+y2−6x−8y+25∀x,yϵR, then