If `a=3^(1/4)+3^(-1/4)` and `b=3^(1/4)-3^(-1/4)` then the value of `3(a^2+b^2)^2`

If 0 lt a,b lt 1 and tan^(-1)a+tan^(-1) b = pi/4 , then the value of (a+b)-((a^2+b^2)/2)+((a^3+b^3)/3)-((a^4+b^4)/4)+... is :

1) If A=[(1,2),(3,4)] , AdjA=[(4,a),(-3,b)] then the values of a and b are ..... a) a=-2, b=1 b) a=2, b=4 c)a=2, b=-1 d) a=1, b=-2

If A = [(1,2),(3,4)] , adj A = [(4,a),(-3,b)] then value of a and b are : (a) a=-2,b=1 (b) a=2,b=4 (c) a=2,b=-1 (d) a=1,b=-2

If A = {1, 2, 3, 4}, B = {3, 4, 5} and C = {1, 4, 5} then the value of A - (B - C) is

If A = {1, 2, 3, 4}, B = {3, 4, 5} and C = {1, 4, 5} then the value of A – (B nn C) is

If A = [(2,-1,2),(1,3,-4)], and B = [(1,-2),(-3,0),(5,4)] then verify that (AB)' = B'A'.

If A= [[1,2],[3,4]] , adjA= [[4,a],[-3,b]] , then the values of a and b are: (a) a=-2, b=1 (b) a=2, b= 4 (c) a=2, b=-1 (d) a=1, b=-2