418531 ภาคต้น 2552/โจทย์ปัญหาการพิสูจน์ II/เฉลยข้อ 4

ข้อย่อย 1

Error

Too many requests (f061ab2)

If you report this error to the Wikimedia System Administrators, please include the details below.

Request served via cp5021 cp5021, Varnish XID 754960388
Upstream caches: cp5021 int
Error: 429, Too many requests (f061ab2) at Tue, 29 Sep 2026 13:23:07 GMT


Sensitive client information

IP address: 158.108.32.49

$a_{n}={\begin{cases}-2,&n=0\\a_{n-1}+4,&n>0\end{cases}}$

ข้อย่อย 2

Error

Too many requests (f061ab2)

If you report this error to the Wikimedia System Administrators, please include the details below.

Request served via cp5021 cp5021, Varnish XID 736816464
Upstream caches: cp5021 int
Error: 429, Too many requests (f061ab2) at Tue, 29 Sep 2026 13:23:08 GMT


Sensitive client information

IP address: 158.108.32.49

$a_{n}={\begin{cases}0,&n=0\\a_{n-1}+2n,&n>0\end{cases}}$

ข้อย่อย 3

Error

Too many requests (f061ab2)

If you report this error to the Wikimedia System Administrators, please include the details below.

Request served via cp5021 cp5021, Varnish XID 765209785
Upstream caches: cp5021 int
Error: 429, Too many requests (f061ab2) at Tue, 29 Sep 2026 13:23:08 GMT


Sensitive client information

IP address: 158.108.32.49

$a_{n}={\begin{cases}2,&n=0\\a_{n-1}+2\cdot (-1)^{n},&n>0\end{cases}}$

ข้อย่อย 4

Error

Too many requests (f061ab2)

If you report this error to the Wikimedia System Administrators, please include the details below.

Request served via cp5021 cp5021, Varnish XID 781355751
Upstream caches: cp5021 int
Error: 429, Too many requests (f061ab2) at Tue, 29 Sep 2026 13:23:08 GMT


Sensitive client information

IP address: 158.108.32.49

$a_{n}={\begin{cases}0,&n=0\\a_{n-1}+2n-1,&n>0\end{cases}}$