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Mathematics
Mathematics
Problem
Range of the function
f
(
x
)
=
x
2
+
x
+
2
x
2
+
x
+
1
f(x) = \frac{x^2 + x + 2}{x^2 + x + 1}
f
(
x
)
=
x
2
+
x
+
1
x
2
+
x
+
2
;
x
∈
R
x \in R
x
∈
R
is a.
(
1
,
∞
)
(1, \infty)
(
1
,
∞
)
b.
(
1
,
11
/
7
)
(1, 11/7)
(
1
,
11/7
)
c.
(
1
,
7
/
3
)
(1, 7/3)
(
1
,
7/3
)
d.
(
1
,
7
/
5
)
(1, 7/5)
(
1
,
7/5
)
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