if for a matrix A , A to the power 5 = I , THEN A inverse =
Find whether f:Z - Z defined by f(x) = x2 + 5 for all x belongs Z is one one or not.
if a*b=c and b*c=a prove that a,b ,c are mutually perpendicular and that IbI =1 and IaI =IcI
(* REPRESENTS CROSS PRODUCT)
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