Question

(-1)X(-1)X(-1)X....2m times,where m is a natural number is equal to

Answer 1

It can possibly done because however 1x1 or -1x-1=1 and this answer will not matter

(2m+1) also not matter much the number which is important is 2 only because -1x-1=1

or(-1)2=1 :2 is even that means answer will come in +. And answer is 1.