OpenStudy (anonymous):

For the series find the first and last term....picture below! help

3 years ago
OpenStudy (anonymous):

3 years ago
OpenStudy (anonymous):

3 years ago
OpenStudy (cp9454):

$\frac{ n(n+1) }{ 2 } + 4n$

3 years ago
OpenStudy (cp9454):

put n=5 and u will get the answer i.e 35

3 years ago
OpenStudy (anonymous):

i got 35 but i dont know how to get the first term

3 years ago
OpenStudy (cp9454):

its 5

3 years ago
OpenStudy (cp9454):

general term is n+4

3 years ago
OpenStudy (anonymous):

so what would n equal if i am trying to find the last term it only gives me 8 and 9 as the two options (ie. 5,8 or 5,9)

3 years ago
OpenStudy (cp9454):

9

3 years ago