3+1=4 5+2=11 6+3=20 9+4=33 8+5=?
3+1=4
5+2=11
6+3=20
9+4=33
8+5=?
Mein Versuch:
\(\begin{array}{|rcll|} \hline 3+1&=&4 \\\\ 5+2&=&4+(5+2) \\ 5+2&=&11 \\\\ 6+3&=&11+(6+3) \\ 6+3&=&20 \\\\ 9+4&=&20+(9+4) \\ 9+4&=&33 \\\\ 8+5&=&33+(8+5) \\ 8+5 &=& 46 \\ \hline \end{array} \)
