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What is the range of f(x)=√(36-(x-2)^2)?

Answer and explanation

Correct answer: [0,6]

The governing idea is that a principal square root produces only non-negative outputs. The radicand 36-(x-2)^2 is at most 36 because (x-2)^2 is at least 0. Its maximum 36 occurs at x=2, giving f(2)=√36=6. The radicand becomes 0 at x=-4 and x=8, so the minimum output 0 is also attained. As x varies over the real domain [-4,8], the radicand takes every value from 0 to 36, and the square root consequently takes every value from 0 to 6. Therefore option A, [0,6], is correct. Option B wrongly includes negative outputs, option C confuses the horizontal shift with output values, and option D gives the radicand interval rather than its square-root interval.

Related tags

Real-Valued-FunctionsRangeRadical-FunctionReal Valued FunctionsTheir Domain And RangeReal Valued Functions Their Domain And RangeRelations And FunctionsMathematicsClass 11 Mcq

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