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#18,19 Help

NotSoSmart  Mar 16, 2018
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18.

 

Since  each successive term  is greater than the previous term.....this series will diverge and will not have a definite sum.......another way to see this is that the common ratio  is 3......for a series to converge, r  must have an absolute value < 1

 

 

19.

 

a)     a1  = 9,    an  = an-1 + 2

 

b)   an  =  9  + 2 (n - 1)

 

c)  a12  =  9 + 2(12 - 1)   =   9 + 2*11  =  9 + 22   =   31 seats

 

 

 

cool cool cool

CPhill  Mar 16, 2018

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