If `Aa n dB` are symmetric matrices of the same order and `X=A B+B Aa n dY=A B-B A ,t h e n(X Y)^T` is equal to `X Y` b. `Y X` c. `-Y X` d. none of these

If A and B are symmetric matrices of the same order and X=AB+BA and Y=AB-BA, then (XY)^(T) is equal to : (A) XY(B)YX(C)-YX (D) non of these

If A and B are symmetrices matrices of the same order, then A B^T B A^T is a (a) skew-symmetric matrix (b) null matrix (c) symmetric matrix (d) none of these

If 8% of x=4% of y, t h e n 20 % of x is a.10 % of y b. 80 % of y c. 16 % of y d. none of these

If A and B are two sets that n(A-B)=14+x in n(A)=n(B) and n(B-A)=3x and also n(A nn B) =x .Then x is equal to a."8," b."7," c."9," d.None of these

If x % of a is the same as y % of b , then z % of b is a.(x y)/z % of a b. (y z)/x % of a c. (x z)/y % of a d. none of these

If A =[(a,b,c),(x,y,z),(l,m,n)] is a skew-symmetric matrix,m nthen which of the following is equal to x+ y+ z?

If ax^(2)+2hxy+by^(2)=0, then (dy)/(dx) is equal to (y)/(x)( b) (x)/(y)(c) ,None of these

The line x+y=p meets the x- and y-axes at Aa n dB , respectively. A triangle A P Q is inscribed in triangle O A B ,O being the origin, with right angle at QdotP and Q lie, respectively, on O Ba n dA B . If the area of triangle A P Q is 3/8t h of the are of triangle O A B , the (A Q)/(B Q) is equal to (a)2 (b) 2/3 (c) 1/3 (d) 3