Question

1/3+1/6+1/11+1/20+1/37... формула

Answer 1

$frac{1}{3};frac{1}{6};frac{1}{11};frac{1}{20};frac{1}{37};\frac{1}{n_1};frac{1}{n_2};frac{1}{n_3};frac{1}{n_4};frac{1}{n_5};\frac{1}{2+1+0};frac{1}{3+2+1};frac{1}{6+3+2};frac{1}{11+6+3};frac{1}{20+11+6};\n_m=n_{m-1}+n_{m-2}+n_{m-3};\frac{1}{n_m}=frac{1}{n_{m-1}+n_{m-2}+n_{m-3}};$