来自何立风的问题
2005爱数学夏令营10/(1*2)+20(1*2*3)+30/(1*2*3*4)+...+90(1*2*3*...*10)10/(1*2)+20/(1*2*3)+30/(1*2*3*4)+...+90/(1*2*3...*10)
2005爱数学夏令营
10/(1*2)+20(1*2*3)+30/(1*2*3*4)+...+90(1*2*3*...*10)
10/(1*2)+20/(1*2*3)+30/(1*2*3*4)+...+90/(1*2*3...*10)
1回答
2020-03-16 20:34