for a sequence in A.P. the sum of n terms of the sequence is (n/2)(163-7n),find the 10th term of the sequence

• the following nth term of the sequence is written as.
  (n/2)(2*73+(n-1)*-7).
  so.
  a=73 and d=-7.
  so 10th term is=a+9d=73+(9*-7)=73-63=10
  so ans=10
• 10 years agoHelpfull: Yes(0) No(1)
• sorry..
  the actual ans=15.
  
• 10 years agoHelpfull: Yes(0) No(1)