If `A xx B={(,(p,q),(p,r)),(,(m,q),(m,r)):}}`, find A and B.

If A={p,q,r,s}, B={r,s,t,u} and C={p,q,r}, then (A-B)-C is .........

If A = {p, q, r, s}, B = {m, n, q, s, t} and C = {m, n, p, q, s}, then verify the associative property of union of sets.

A=[{:(l_(1),m_(1),n_(1)),(l_(2),m_(2),n_(2)),(l_(3),m_(3),n_(3)):}] and B=[{:(p_(1),q_(1),r_(1)),(p_(2),q_(2),r_(2)),(p_(3),q_(3),r_(3)):}] Where p_(i), q_(i),r_(i) are the co-factors of the elements l_(i), m_(i), n_(i) for i=1,2,3 . If (l_(1),m_(1),n_(1)),(l_(2),m_(2),n_(2)) and (l_(3),m_(3),n_(3)) are the direction cosines of three mutually perpendicular lines then (p_(1),q_(1), r_(1)),(p_(2),q_(2),r_(2)) and (p_(3),q_(),r_(3)) are

If A=[(a,b,c),(x,y,x),(p,q,r)], B=[(q,-b,y),(-p,a,-x),(r,-c,z)] and If A is invertible, then which of the following is not true ?

If [(0,p,3),(2,q^(2),-1),(r,1,0)] is skew- symmetric, find the values of p,q, and r.

If A= [(2x,2y,2z),(2a,2b,2c),(2p,2q,2r)] and Delta =[(x,y,z),(a,b,c),(p,q,r)] then det A is

If [{:(0,p,3),(2,q^2 , -1),(r, 1,0):}] is skew-symmetric , find the values of p , q and r

Prove that |A| = | ((q+r)^2 ,p^2,p^2),(q^2 ,(r + p)^2, q^2),(r^2 , r^2 , (p+q)^2)| = 2pqr(p+q+r)^3

If the ratio of the roots of a x ^2+2b x+c=0 is same as the ratios of roots of p x^2+2q x+r=0, then a. (2b)/(a c)=(q^2)/(p r) b. b/(a c)=(q^)/(p r) c. (b^2)/(a c)=(q^2)/(p r) d. none of these