Describe the following set in Roster form:

(viii) The set of all letters in the word 'Trigonometry'.

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Solution

All letters in the word 'Trigonometry' means no letter occur more than once.

Trigonometry $= t, r, i, g, o, n, m, e, y$

$∴$ Roster form will be $= {t, r, i, g, o, n, m, e, y}$ .

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(viii) The set of all letters in the word ' Trigonometry'.

(ix) The set of all letters in the word 'Better'.

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