alisongc alisongc
  • 21-12-2020
  • Mathematics
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Find the 10th term of the geometric sequence 8, -24, 72, ...

Respuesta :

nadia2318116
nadia2318116 nadia2318116
  • 21-12-2020

Step-by-step explanation:

r=-24/8=72/-24=-3  

By using this equation:

a(n)=a(1)*r^(n-1)

and we have a(1)=8 , r=-3    

a(n)=8*(-3)^(n-1)

a(10)=8*(-3)^(10-1)

       =8*(-3)^9

       =-157464

hope this helps

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