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Choose the roster form of H={x: x is a natural number and 5<x<9}.

Answer and explanation

Correct answer: H={6,7,8}

The set-builder condition requires a natural number x to be strictly greater than 5 and strictly less than 9. Checking the integers between the two endpoints gives 6, 7, and 8. Because both inequality signs are strict, neither 5 nor 9 belongs to H. Therefore the correct roster form is {6,7,8}, which is option B. The other choices include one or both excluded endpoints.

Related tags

SetsRoster-FormInequalitiesNumber SystemsClass 9 McqGeneral Chapter PracticeMathematics

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