If `R={(a, -2), (-5, b), (8, c), (d, -1)}` represents the identify functions, find the value of a, b, c and d.

"If A"= ({:(2, 3),(5, 1):}), B = ({:(a, b),(c, d):}) and AB = -13I, then find the value of a + b - c + d. (a) 5 (b) 3 (c) 2 (d) 1

If the points A(a ,\ -11),\ \ B(5,\ b),\ \ C(2,\ 15) and D(1,\ 1) are the vertices of a parallelogram A B C D , find the values of a and b .

Consider the matrices : A = {:[(1,-2),(-1,3)] and B = [(a,b),(c,d)] . If AB = {:[(2,9),(5,6)] , find the values of a,b,c and d.

If A, B, C and D represents X, divide, + and - respectively, then find the value of 90B3A5D3C9.

If A=[[1,0],[2,1]] and A^(2012)=[[a,b],[c,d]] then find the values of a,b,c and d.

If   ( a -5 )^2 + ( b - c )^2 + ( c - d )^2 + ( b + c + d - 9 )^2 = 0 , then find the value of ( a + b + c ) ( b + c + d ) is

If a ,b ,c ,d are distinct integers in an A.P. such that d=a^2+b^2+c^2, then find the value of a+b+c+d

If a^(-1),b^(-1),c^(-1),d^(-1) are in A.P then find the value of (a^(-2)-d^(-2))(b^(-2)-c^(-2))^(-1)

If a,b,c,d are distinct integers in an A.P. such that d=a^(2)+b^(2)+c^(2) , then find the value of a+b+c+d.

If a,b,c,d are distinct integers in an A.P. such that d=a^(2)+b^(2)+c^(2), then find the value of a+b+c+d