Let `Ma n dN` be two `3xx3` non singular skew-symmetric matrices such that `M N=N Mdot` If `P^T` denote the transpose of `P ,` then `M^2N^2(M^T N^(-1))^T` is equal to `M^2` b. `-N^2` c. `-M^2` d. `M N`

Let MandN be two 3xx3 non singular skew- symmetric matrices such that MN=NM* If P^(T) denote the transpose of P, then M^(2)N^(2)(M^(T)N)^(-1)(MN^(-1))^(T) is equal to M^(2) b.-N^(2) c.-M^(2) d.MN

If l, m, n denote the side of a pedal triangle, then (l)/(a ^(2))+(m)/(b^(2))+(n)/(c ^(2)) is equal to

Let Ma n dN be two 3xx3 matrices such that M N=N Mdot Further, if M!=N^2a n dM^2=N^4, then Determinant of (M^2+M N^2) is 0 There is a 3xx3 non-zeero matrix U such tht (M^2+M N^2)U is the zero matrix Determinant of (M^2+M N^2)geq1 For a 3xx3 matrix U ,if(M^2+M N^2)U equal the zero mattix then U is the zero matrix

If m ,n in Na n dm^2-n^2=13 ,t h e n(m+1)(n+1) is equal to a. 42 b. 56 c. 50 d. none of these

If A is a matrix of order m xx n and B is a matrix such that AB^(T) and B^(T)A are both defined,then the order of matrix B is m xx n (b) n xx n( c) n xx m(d)m xx n