Understanding Functions, Domain, and Range
Algebra · Flashcards · Application
ALGEBRA · FLASHCARDS
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QUESTION
Evaluate
f
(
−
1
)
f(-1)
f
(
−
1
)
for
f
(
x
)
=
x
2
+
2
f(x)=x^2+2
f
(
x
)
=
x
2
+
2
.
QUESTION
Identify the domain of the relation
{
(
1
,
2
)
,
(
2
,
5
)
,
(
3
,
5
)
}
\{(1,2),(2,5),(3,5)\}
{(
1
,
2
)
,
(
2
,
5
)
,
(
3
,
5
)}
.
QUESTION
Identify the output when
f
(
x
)
=
x
2
−
1
f(x)=x^2-1
f
(
x
)
=
x
2
−
1
and the input is
x
=
3
x=3
x
=
3
.
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ANSWER
8
8
8
. Substitute
x
=
3
x=3
x
=
3
:
f
(
3
)
=
3
2
−
1
=
9
−
1
=
8
f(3)=3^2-1=9-1=8
f
(
3
)
=
3
2
−
1
=
9
−
1
=
8
.
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