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What is the range of the function f = {(1,5), (2,5), (3,6)}?

Answer and explanation

Correct answer: {5,6}

The governing concept is the range of a function. The range is the set of all actual output values, which are the second components of the ordered pairs. In the given function, the pairs are (1,5), (2,5), and (3,6). Hence the outputs are 5, 5, and 6. Because a set lists distinct elements only once, the repeated value 5 is written once, giving the range {5,6}. Option A is therefore correct. Option B, {1,2,3}, consists of the first components and is the domain, not the range. Option C incorrectly combines an input with the output values. Option D includes inputs 2 and 3, omits output 6, and therefore cannot be the range. The repeated output does not create a second distinct set element.

Related tags

FunctionsRangeDomain-And-RangeMathematicsClass 11Real Valued FunctionsTheir Domain And RangeReal Valued Functions Their Domain And RangeRelations And Functions

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