Relations and Functions

Relations and Functions

Question

Write the following in the roster form :

(i)    { x : x is an integer and space space space straight x squared less or equal than 9}

(ii)   { x : x space space element of N, s is a common divisor of 54 and 72}

(iii)  { x :x is an integer and 2= 1}

Answer

(i)    { -3, -2, -1, 0, 1, 2, 3}
(ii)    {1, 2, 3, 6, 9, 18}
(iii)    { 0 }

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