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想請問為什麼最後一行會變成2/5
-
noo
1512
原式= lim
(Vn? + 5n+1 –n)(Jn? + 5n+1+n)
Vn? + 5n+1+n
n+ 5n+1-n?
5n +1
Vn? + 5n+1+n
Vn² + 5n+1+n
?
-
= lim
= lim
=
no
noo
5
:
- lim
1
5+二
n
5 1
+ +
+1
2
n n
2
n-too
Answers
Apa kebingunganmu sudah terpecahkan?