Two marks exercise problems IV — task. Mathematics State Board, Class 10.

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Let

$A = \{9, 10, 11, 12, 13, 14, 15, 16, 17\}$ and let

$f: A \rightarrow N$ be defined by

$f(n) =$ the highest prime factor of

$n \in A$ . Write

$f$ as a set of ordered pairs and find the range of

$f$ .

$f = \{\begin{array}{l} (i, i), (i, i), (i, i), (i, i), (i, i), \\ (i, i), (i, i), (i, i), (i, i) \end{array}\}$

Range of

$f$

$=$

$\{i, i, i, i, i, i\}$

[Note: Enter the numbers as per the given order]

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6. Two marks exercise problems IV