Seudónimo Seudónimo 18-01-2020 Mathematics contestada Compute the sum \[2\left(2\frac12\right)+3\left(2\frac13\right)+4\left(2\frac14\right)+5\left(2\frac15\right)+\cdots+10\left(2\frac1{10}\right).\] The person who answers it correctly(only answer) will be crowned or something like that.
