The sum of the series 1 + 1(1 + 1/n) + 3(1 + 1/n)2 is equal to?
a. n^3
b. n^2
c. n^-2
d. none of these

• the answer is non of these if u put the any value of n it will not satisfy the remaining given condition.
• 10 years agoHelpfull: Yes(1) No(2)
• The sum comes out to be 2n2+2n+1. hence D
• 10 years agoHelpfull: Yes(0) No(1)
• 1+1,3,5,7___(1+1/n)1,2,3,4,5___
  1+(1+(n-1)2)(1+1/n)n
  1+(2n-1)(n+1/n)(n)
  1+(2n-1)(n+1)
  1+2n*n+n-1
  2n*n+n
  so answer is none of these (d)
• 10 years agoHelpfull: Yes(0) No(2)
• The ans is n*n
• 7 years agoHelpfull: Yes(0) No(0)