Question icon
Grade 11Algebra

if s1,s2,s3 are the sum of first n natural numbers their squares their cubes respectively then s3{1+8s1}/s22is equal to

Profile image of ram
11 Years agoGrade 11
Answers icon

1 Answer

Profile image of ashish
11 Years ago
S3(1+8S1)/S2.S2=.6.6n2(n+1)2 [1+4n(n+1)]/4.n.(n+1).(2n+1).n.(n+1).(2n+1)
    By solving above ,We get
                          =36/9
 
                           =4