" 20.If "A=[[x,x],[x,x]]," then "A^(n)=............,n in N

If A=[[x,xx,x]] then A^(n)=......... and n varepsilon N

If A=([x,x],[x,x]) then A^(n)(n in N)= 1) ([2^nx^n,2^nx^n],[2^nx^n,2^nx^n]) 2) ([2^(n-1) x^n,2^(n-1) x^n],[2^(n-1) x^n,2^(n-1) x^n]) 3) I 4) ([2^(n) x^(n-1),2^(n) x^(n-1)],[2^(n) x^(n-1),2^(n) x^(n-1)])

The period of f(x)=[x]+[2x]+[3x]+[4x]+[n x]-(n(n+1))/2x , where n in N , is (where [dot] represents greatest integer function) then which of the following is correct a. n (b) 1 (c) 1/n (d) none of these

The period of f(x)=[x]+[2x]+[3x]+[4x]+[n x]-(n(n+1))/2x , where n in N , is (where [dot] represents greatest integer function) then which of the following is correct a. n (b) 1 (c) 1/n (d) none of these

The period of f(x)=[x]+[2x]+[3x]+[4x]+[n x]-(n(n+1))/2x , where n in N , is (where [dot] represents greatest integer function) then which of the following is correct a. n (b) 1 (c) 1/n (d) none of these

The period of f(x)=[x]+[2x]+[3x]+[4x]+[n x]-(n(n+1))/2x , where n in N , is (where [dot] represents greatest integer function). (a) n (b) 1 (c) 1/n (d) none of these

If A={x:x=3^(n)-2n-1, n in N} and B={x:x = 4(n-1), n in N} . Then

If A={x:x=3^(n)-2n-1, n in N} and B={x:x = 4(n-1), n in N} . Then

If, for a positive integer n , the quadratic equation, x(x+1)+(x-1)(x+2)+................+(x+ n-1)(x+n)=10 n has two consecutive integral solutions, then n is equal to : (1) 10 (2) 11 (3) 12 (4) 9

Let A={x:x in N},B={x;x2n,n in N},C={x:x=2n-1,n in N}and,D={x:x is a prime natural number }. Find: A nn B