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Problem
Problem
If
lim
x
→
∞
(
x
2
+
x
+
1
x
+
1
−
a
x
−
b
)
=
4
\lim_{x \to \infty} \left( \frac{x^2 + x + 1}{x + 1} - ax - b \right) = 4
lim
x
→
∞
(
x
+
1
x
2
+
x
+
1
−
a
x
−
b
)
=
4
, then a.
a
=
1
,
b
=
4
a = 1, b = 4
a
=
1
,
b
=
4
b.
a
=
1
,
b
=
−
4
a = 1, b = -4
a
=
1
,
b
=
−
4
c.
a
=
2
,
b
=
−
3
a = 2, b = -3
a
=
2
,
b
=
−
3
d.
a
=
2
,
b
=
3
a = 2, b = 3
a
=
2
,
b
=
3
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