Question

продолжи ряд чисел 1, 2, 4, 7, 11,

Answer 1

1,2,4,7,11,16,22,29,37,46,56,....

$a_{n 1}=a_n n , a_1=1</var>$</p> <p><img src=[/tex]a_n=frac{n(n-1)}{2}+1" title="a_{n+1}=a_n+n , a_1=1\" title="a_n=frac{n(n-1)}{2}+1" title="a_{n+1}=a_n+n , a_1=1\" alt="a_n=frac{n(n-1)}{2}+1" title="a_{n+1}=a_n+n , a_1=1\" />

$a_{n+1}=a_n+n , a_1=1</var>$

[tex]a_n=frac{n(n-1)}{2}+1" />

 

Answer 2

an+1=an+n

Значит, 1,2,4,7,11,16,22,29,37,46...