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1 of 8 0-day streak

Lesson Practice

Find the maximal domain of an algebraic function

DIFFICULTYintro standard challenge exam

QUESTION TYPEMix of allChange

Linear denominator Linear square-root radicand NOWMix of allRecommended

Question 1 of 8

No calculator

Let \(h(u)\) be the function defined by

h(u)=\sqrt{-2\left(u-5\right)}

(a)1 mark

What domain restriction is contributed by the square-root radicand \(-2\left(u-5\right)\)?

u\in\left(-\infty,\;5\right)

u\in\left(-\infty,\;5\right]

(b)1 mark

Select the maximal real domain of h

u\in\left(-\infty,\;5\right]

u\in\left(-\infty,\;5\right)

u\in\mathbb{R}

u\in\left[5,\;\infty\right)