DeadlineGreaserAlice
DeadlineGreaserAlice DeadlineGreaserAlice
  • 25-03-2019
  • Mathematics
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Find the Nth term of the sequence,then find the 20th term
1. the first term = 2 and D=3

2.-6,-4,-2

3.the first term= 0 and D=2/3

4.2/5,1/15,-4/15

Respuesta :

matthewkchau2005
matthewkchau2005 matthewkchau2005
  • 25-03-2019

1. nth term=3n-1

  20th term=3(20)-1=60-1=59

2. nth term=-2n-4

   20th term=-2(20)-4=-40-4=-44

3. nth term=[tex]\frac{2}{3}[/tex]n-[tex]\frac{2}{3}[/tex]

   20th term=[tex]\frac{2}{3}[/tex](20)-[tex]\frac{2}{3}[/tex]=[tex]\frac{40}{3}[/tex]-[tex]\frac{2}{3}[/tex]=[tex]\frac{38}{3}[/tex]

4. nth term=-[tex]\frac{1}{3}[/tex]n+[tex]\frac{11}{15}[/tex]

   20th term=-[tex]\frac{1}{3}[/tex](20)+[tex]\frac{11}{15}[/tex]=-[tex]\frac{20}{3}[/tex]+[tex]\frac{11}{15}[/tex]=-[tex]\frac{89}{15}[/tex]

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