If `A={1,b,b,{4,2},{x,y,z},d,{d}}` , then `n(A)` is

If A={a,b,c,d} and B={w,xy,z} , then which of the following is a relation from set A to B? Given reason: (i) R_(1)={(a,w),(a,x),(a,y),(a,z)} (ii) R_(2)={(w,b),(z,c),(y,d)} (iii) R_(3)={(a,y),(b,y),(w,y),(d,y)} (iv) R_(4)={(b,z),(b,y),(c-z),(c,w)}

If A={2, 3, 4} , B={1, 3, 7} and R={(x , y): x in A , y in B a n d x

If D_(1)=|(a,b,c),(x,y,z),(l,m,n)|andD_(2)=|(m,-b,y),(-l,a,-x),(n,-c,z)| evaluate D_(1)+D_(2) .

If a,b,c,d are in A.P.and x,y,z are in G.P. then show that x^(b-c)*y^(c-a)*z^(a-b)=1

If x!=y!=za n d|[x,x^2, 1+x^3],[y ,y^2 ,1+y^3],[z, z^2, 1+z^3]|=0, then the value of x y z is a.1 b. 2 c. -1 d. 2