Question

5*. – 25 + (–24) + (–23) + ... + 24 + 25 + 26.

Answer 1

Ответ будет 26, тк все остальные числа взаимоуничтожаются. Такие как 25 и - 25; 24 и - 24 и тд.

Answer 2

To simplify this expression, we can first group the terms that have the same sign:

= (5 + 26) + (-25 - 24 - 23 - ... + 24 + 25)

Next, we can simplify the sum inside the parentheses by noting that the sum of consecutive integers from -n to n is equal to 0.5n(n+1), where n is a positive integer:

= (5 + 26) + [-0.5(25)(26) + 0.5(24)(25)]

= 31 + [-325 + 300]

= 6

Therefore, the value of the expression is 6.