$$ \begin{array}{1) \text { Question ] 31 \begin{array}{1} \text { Answer saved } \text { Marked out of } 2.50 \text { Flag question ? \quad \begin{array}{1} \text { Select one:) W \quad c_{1) "[t]+c_{2} e^{-}-t c_{i} t e{t)+c_{2} ^{-} c_{1} ^{t}+c_{2} e^{-t}-t^{2} \ ttc_{1} e^{t}+c_{2} e^{-t} \end{array} \end{array \end{array $$ SP.SD.477