Page 105 - BacII 2011-2017 by Lim Seyha
P. 105
វិទយល័យសេម�ចឳ េខត�េស ម�ប 103
• តារាងអ រភាព f
x –∞ –1 +∞
f (x) + +
′
+∞ +
+∞∞
f(x)
– –∞
–∞∞
• សង់ ប
2
0 – 0 – 3
◦ C ∩ (y oy) គឺ x = 0; ⇒ y = = –3
′
0 + 1
2
◦ C ∩ (x ox) គឺ y = 0 ⇒ x – x – 3 = 0
′
(c)
√
2
2
∆ = b – 4ac = (–1) – 4(1)(–3) = 13 ⇒ x = 1 ± 13 ; x = 2.3, x = –1.3
2
y
(d) : y = x – 2
x 0 2 4
y –2 0 y = x – 2
2
(d) :
x
• •
–6 –5 –4 –3 –2 –1 1 2 3 4 5 6
–2
•
–4
x
=
–6
–1
ចង�កងេ�យ ល ី ម ស ី � �គ គណ ិ តវិទយវិទយល័យសេម�ចឳ Tel: 012689353
