Solución
lim
x
→
−
9
(
x
f
(
x
)
+
2
g
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x
)
)
=
(
lim
x
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−
9
x
)
(
lim
x
→
−
9
f
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x
)
)
+
2
lim
x
→
−
9
g
(
x
)
=
−
46
\mathop {\lim }\limits_{x \to - 9} \left( {xf\left( x \right) + 2g\left( x \right)} \right) = \left( {\mathop {\lim }\limits_{x \to - 9} x} \right)\left( {\mathop {\lim }\limits_{x \to - 9} f\left( x \right)} \right) + 2\mathop {\lim }\limits_{x \to - 9} g\left( x \right) = - 46
x
→
−
9
lim
(
x
f
(
x
)
+
2
g
(
x
)
)
=
(
x
→
−
9
lim
x
)
(
x
→
−
9
lim
f
(
x
)
)
+
2
x
→
−
9
lim
g
(
x
)
=
−
46