limn→∞23n-32n+123n+32n=______.-数学

题目简介

limn→∞23n-32n+123n+32n=______.-数学

题目详情

lim
n→∞
23n-32n+1
23n+32n
=______.
题型:填空题难度:中档来源:重庆

答案

lim
n→∞
23n-32n
23n+32n
=
lim
n→∞
8n-3•9n
8n+9n
=
lim
n→∞
(class="stub"8
9
)
n
-3
(class="stub"8
9
)
n
+1
=class="stub"0-3
0+1
=-3
故答案为-3

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