What is the domain of the function in the graph?
1
2
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7
8
9
-1
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14
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20
-2
r
d
2
≤
d
≤
7
\displaystyle {2}\le{d}\le{7}
2
≤
d
≤
7
2
≤
r
≤
7
\displaystyle {2}\le{r}\le{7}
2
≤
r
≤
7
9
≤
d
≤
14
\displaystyle {9}\le{d}\le{14}
9
≤
d
≤
14
9
≤
r
≤
14
\displaystyle {9}\le{r}\le{14}
9
≤
r
≤
14
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