bewellplus.gsu.edu
aguzman aguzman
  • 02-07-2015
  • Mathematics
Answered

the sum of the first 30 terms of the sequence an=6n+5 is

Verified Answer :

kimeto3
kimeto3 kimeto3
  • 02-07-2015

Sum= n(a₁+an)/2 where a₁ is the first term, and an is the nth term(30th for this)
an= 6n+5
a₁=6(1)+5
   =11
a₃₀=6(30)+5
     =185
Sum= 30(11+185)/2
       =15(196)
       =2940

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