# Inspired by Issac Newton

**Algebra**Level 4

\[\large \sum _{ k=1 }^{ 20 }{ \left( { \alpha }^{ 3k }+{ \beta }^{ 3k }+{ \xi }^{ 3k } \right) }\]

\[ \begin{cases} {f\left( -1 \right) =-9} \\ {f\left( 1 \right) =-7 } \\ {f\left( 3 \right) =19} \end{cases} \]

If \(f\left( x \right) \) is monic cubic polynomial having roots \(\alpha ,\beta ,\xi \). Then evaluate topmost expression modulo 17.