Question

write roster method A={x:x belongs to N, x²<=40​

Answer 1

Answer:

                 A={1,2,3,4,5,6}

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Solution,

            A={x:x belongs to N, x²<=40​}

• Here, all elements of A are natural numbers and their squares are lower than 40.

• The nearest perfect square lower 40 than is 36.

• The square root of 36 is 6.

• Therefore, all natural numbers lower than 6 are the elements of A.

 Thus this set in roster form is,

                      A={1,2,3,4,5,6}

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              Hope this helps you