If A is invertible then which of the following is not true? (A) `A^-1=|A|^-1` (B) `(A^\')^-1=(A^-1)\'` (C) `(A^2)^-1=(A^-1)^2` (D) none of these

If A is an invertible matrix, then which of the following is not true (A^2)^-1=(A^(-1))^2 (b) |A^(-1)|=|A|^(-1) (c) (A^T)^(-1)=(A^(-1))^T (d) |A|!=0

If A is an invertible matrix then which of the following are true? (A) A!=0 (B) |A|!=0 (C) adjA!=0 (D) A^-1=|A|adjA

If A and B are invertible matrices of the same order then (A) Adj(AB)=(adjB)(adjA) (B) (A+B)^-1=A^-1+B^-1 (C) (AB)^-1=B^-1A^-1 (D) none of these

If A and B are invertible matrices, which of the following statement is not correct. a d j\ A=|A|A^(-1) (b) det(A^(-1))=(detA)^(-1) (c) (A+B)^(-1)=A^(-1)+B^(-1) (d) (A B)^(-1)=B^(-1)A^(-1)

If f(x)={[-3x+2,x =1]} ,then which of the following is not true (A) f'(1^(+))=1 (B) f'(1^(-))=-3 (C) f'(1^(-))=f'(1^(+))=1 (D) f is not differentiable at x=1

If tan A=(1)/(2) and tan B=(1)/(3) , then which of the following is true ?

Which of the following is true ?(A)int_(0)^(1)e^(x^(2))dx =e(C)1 =e(D) None of these

If A and B are symmetric and commute,then which of the following is/are symmetric? A^(-1)B b.AB^(-1) c.A^(-1)B^(-1) d.none of these

The direction cosines of line joining (1,-1,1) and (-1,1,1) are (A) 2,-2,0 (B) 1,-1,0 (C) 1/sqrt(2)-1/sqrt(2),0 (D) none of these

int_0^oo (xlogx)/(1+x^2)^2dx= (A) e (B) 1 (C) 0 (D) none of these