Mathematics
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OpenStudy (elenathehomeschooler):
1. For each of the following functions, (a) describe the domain and range, and (b) sketch
the graph.
a. f(x) ^5sqr(x-4)+2
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OpenStudy (elenathehomeschooler):
@jim_thompson5910 can you help me ring the range and domain?
OpenStudy (elenathehomeschooler):
*find
OpenStudy (anonymous):
is it \[f(x)=\sqrt[5]{x-4}+2\]?
OpenStudy (elenathehomeschooler):
yes
OpenStudy (anonymous):
you can take an odd root (3,5,7,...) of ANY number
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OpenStudy (anonymous):
i.e. the there are no restrictions on the domain
OpenStudy (elenathehomeschooler):
so the domain would be all real numbers?
OpenStudy (anonymous):
yes
OpenStudy (elenathehomeschooler):
how do i find the range?
OpenStudy (anonymous):
as x gets larger and larger, so does \(\sqrt[5]{x}\) i.e as \(x\to \infty\) your function goes to infinity as well
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OpenStudy (anonymous):
and as \(x\to -\infty\) so does your function
OpenStudy (anonymous):
that is not really an explanation, though, that is just a fact not sure how to explain it in words
OpenStudy (anonymous):
and odd root will have this same property
OpenStudy (elenathehomeschooler):
so for range it would be \[\infty,-\]
OpenStudy (anonymous):
all real numbers just like the domain
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OpenStudy (elenathehomeschooler):
\[(\infty,-\infty)\]
OpenStudy (anonymous):
oh no you don't put the \(-\infty\) on the right! it goes on the left
OpenStudy (elenathehomeschooler):
oh okay