Найдите сумму 1/15+1/14×15+1/13×14+1/12×13+1/11×12

Question

Найдите сумму 1/15+1/14×15+1/13×14+1/12×13+1/11×12

Answer 1

1/15+1/14*15+1/13*14+1/12*13+1/11*12=4,38926073926