If `[(2+x,3,4),(1,-1,2),(x,1,-5)]` is a singular matrix then x is
(A) `13/25` (B) `-25/13` (C) `5/13` (D) `25/13`

If the matrix [(1,3,lamda+2),(2,4,8),(3,5,10)] is singular then find lamda

If A=[(1,2,0),(-1,1,2),(2,-1,1)] then det (Adj(AdjA))= (A) 13 (B) 13^2 (C) 13^4 (D) none of these

If x, 2x+ 2, 3x + 3 are in G.P. , then the fourth term is (A) 27 (B) -27 (C) 13.5 (D) -13.5

9+|-4| is equal to: (a)5 (b) -5 (c) 13 (d) -13

If x+1/x=5, then x^2+1/(x^2)=? (a)25 (b) 10 (c) 23 (d) 27

The reciprocal of the fraction 2 3/5 is (a) 2 5/3 (b) (13)/5 (c) 5/(13) (d) 2 2/5

If A={:[(-2,5),(1,3)]:}andB={:[(6,0),(3,-5)]:} , evaluate AB and BA.

Suppose that two cards are drawn at random from a deck of cards. Let X be the number of aces obtained. Then the value of E(X) is(A) (37)/(221) (B) 5/(13) (C) 1/(13) (D) 2/(13)

The distance of the point P(1,-3) from the line 2y-3x=4 is (A) 13 (B) (7)/(13)sqrt(3) (C) sqrt(13) (D) (7)/(13)

If x^2+1/(x^2)=102 , then x-1/x=? (a)8 (b) 10 (c) 12 (d) 13