

Spännande andragradsfunktion
Presentation
•
Mathematics
•
11th - 12th Grade
•
Hard
Svetlana Yushmanova
FREE Resource
6 Slides • 4 Questions
1
2
3
4
Multiple Choice
Om nollställen är x1=a och x2=b
och jag vet att koefficienten framför x2 -termen är 1 så kan polynomet skrivas
f(x)=(x−a)(x−b)
f(x)=(x+a)(x+b)
informationen är otillräcklig
5
6
Multiple Choice
(x−a)(x−b)=x2−bx−ax+ab
ja, det stämmer
nej, det är fel på tecknen
man kan inte veta vilka tecken det är om man inte vet värden på a och b
7
Multiple Choice
x2−bx−ax+ab
kan vidare skrivas som
x2+(−b−a)x+ab
x2−abx+ab
man kan inte skriva om det eftersom man inte vet vad a och b är
8
9
Multiple Choice
Vi har en ekvation 2x+7=ax+b
med andra ord:
VL= 2x+7
HL=ax+b
då vet man att a=2 och b=7
man kan inte dra några slutsatser utan en ekvation till
10
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