enkel algebra!
Posted: 04/10-2009 13:24
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a + 1 + 1-a / a-1Blir det:
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a^2 - aCode: Select all
a^2 - a / a - 1Blir det:
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Blir det:
Posted: 04/10-2009 13:30
Hvis [tex]a+1-\frac{1-a}{a-1}[/tex] er oppgaven din, er svar 2 det riktige, men det kan forkortes ytterligere.
Edit: Skriveleif
Edit: Skriveleif
Posted: 04/10-2009 13:30
[tex]a + 1 + \frac{1-a}{a-1}[/tex]
[tex]\frac{a(a-1)+(a-1)+(1-a)}{a-1}[/tex]
[tex]\frac{a^2-a+a-1+1-a}{a-1}[/tex]
[tex]\frac{a^2-a}{a-1}[/tex]
[tex]\frac{a(a-1)}{a-1}[/tex]
[tex]a[/tex]
[tex]\frac{a(a-1)+(a-1)+(1-a)}{a-1}[/tex]
[tex]\frac{a^2-a+a-1+1-a}{a-1}[/tex]
[tex]\frac{a^2-a}{a-1}[/tex]
[tex]\frac{a(a-1)}{a-1}[/tex]
[tex]a[/tex]
Posted: 04/10-2009 13:35
Et annet alternativ for å løse den er:
[tex]a+1+\frac{-1(a-1)}{a-1}=a+1+\frac{-1\cancel {(a-1)}}{\cancel {a-1}}=a+1-1=a[/tex]
[tex]a+1+\frac{-1(a-1)}{a-1}=a+1+\frac{-1\cancel {(a-1)}}{\cancel {a-1}}=a+1-1=a[/tex]
Posted: 04/10-2009 16:01
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3x-2y - (3x²-6y²)/(x+3y)Jeg får følgende:
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7xy/(x+3y)Posted: 04/10-2009 16:02
Stemmer det 