SOLUTION: the sum to n terms of a sequence of numbers is given as:
Sn=n/2(5n+9). or Sn=(n/2)(5n+9)
find the 20th term of this sequence
Algebra.Com
Question 852680: the sum to n terms of a sequence of numbers is given as:
Sn=n/2(5n+9). or Sn=(n/2)(5n+9)
find the 20th term of this sequence
Answer by Kingsley(15) (Show Source): You can put this solution on YOUR website!
Sn=20/2( 5[20] + 9 )
20/2(100+9)
20( 50 + 9 )
ans.=1180
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