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#1

$Old$ December 3rd, 2008, 04:08 PM

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State the domain and range of the following functions

a) $y=\sqrt x$
b) $y=2\sqrt(x+3) - 4$

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$Old$ December 3rd, 2008, 04:42 PM

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State the domain and range of the following functions

a) $y=\sqrt x$
b) $y=2\sqrt(x+3) - 4$

a) $y=\sqrt x$

Domain is $[0, \infty)$
Range is $[0, \infty)$

b) $y=2\sqrt{x+3} - 4$

Domain is $[-3, \infty)$
Range is $[-4, \infty)$

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$Old$ December 3rd, 2008, 04:43 PM

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a) $y=\sqrt x$

Domain is $[0, \infty)$
Range is $[0, \infty)$

b) $y=2\sqrt{x+3} - 4$

Domain is $[-3, \infty)$
Range is $[-4, \infty)$

Do those y values mean infinity, and if so why are they infinity?

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