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The range of the function f(x)=x+5 is (7,9). What is the function's domain? Is it (2,4) (-2,-4) (12,14) (-12,-14) (0,5)

The range of the function f(x)=x+5 is (7,9). What is the function's domain? Is it (2,4) (-2,-4) (12,14) (-12,-14) (0,5)
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3 votes
The range of the function f(x)=x+5 is (7,9). What is the function's domain?

Is it
(2,4)
(-2,-4)
(12,14)
(-12,-14)
(0,5)

asked
User Ricky Supit
by
8.3k points

1 Answer

7 votes
The function is : f ( x ) = x + 5
If the range is ( 7, 9 ) we have to find the domain.
7 = x 1 + 5
x 1 = 7 - 5 = 2
9 = x 2 + 5
x 2 = 9 - 8 = 4
Answer:
The domain is : A ) ( 2, 4 )
answered
User RJ Cuthbertson
by
8.4k points
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