n(n+1)(4n²+2n)(n+1)+3n – InterviewSolution

1.

n(n+1)(4n²+2n)(n+1)+3n

Answer»

n(n+1)(4n²+2n)(n+1) +3n= 2n(2n+1)n(n+1)(n+1)+3n= 2n²(n+1)²(2n+1) +3n=n(2n(n+1)²(2n+1)+3)

But it's wrong answer I had also done but it say wrong

By the way thanks

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