Question 2
If $2\oplus2=2+4$, $3\oplus5=3+6+9+12+15$. Find the value of $6\oplus4$.
Editorial interpretation: for this question, use $a\oplus b=a+2a+\ldots+ba$. This is the intended pattern suggested by the examples, rather than a uniquely specified operation.
Editorial interpretation: for this question, use $a\oplus b=a+2a+\ldots+ba$. This is the intended pattern suggested by the examples, rather than a uniquely specified operation.