1003107210 | math4u.vsb.cz

SubArea:

Arithmetic sequences

Level:

Project ID:

1003107210

Source Problem:

Accepted:

1

Clonable:

1

Easy:

0

Solve the inequality with the variable

x

, where

x

is a natural number:

\sum_{n = 1}^{x} (\frac{2}{5} n - 1) \leq x

x \leq 9; x \in N

x \leq 10; x \in N

x \in (- \infty; 8]

x \geq 8; x \in N

there is no solution in

N