armin2 armin2
  • 17-06-2017
  • Mathematics
contestada

Piz help me out with this one

Piz help me out with this one class=

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AwesomeMochi
AwesomeMochi AwesomeMochi
  • 17-06-2017
Answer: -2n+9

This is because the starting value is 9, so it has to be included in the equation. 
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ghanami
ghanami ghanami
  • 17-06-2017
hello : 
the formula is : an = a1+(n-1)d        a1 : the first term       d : is the common diff
an = 9+(n-1)(-2)
 an =9-2n+2
an = -2n +[ 11 ]
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