Объяснение:
No or not?
Grammar > Easily confused words > No or not?
из English Grammar Today
No and not are the two most common words we use to indicate negation. We use no before a noun phrase:
There’s no address on the envelope.
[parent to child]
No biscuits before dinner!
No decisions have been made.
We use not with any other phrase or clause:
It’s not often that you stop and think about the way you breathe.
Not suitable for children under 15.
Not surprisingly, it was a tense match but eventually the more experienced Australians won.
A:
Do you go cycling all year round?
B:
Not in the winter.
PascalABC.NET 3.7:
##var sumOfAP := function(a1, an, d: real):real → (a1 + an)/2*((an - a1)/d+1);var (a, b) := ReadInteger2('Введите a и b:');var sE := sumOfAP(a + a mod 2, b - b mod 2, 2);var sO := sumOfAP(a + 1 - a mod 2, b - 1 + b mod 2, 2);Print('Результат:', sE - sO)Пояснение:
Используется формула для нахождения суммы первых n членов арифметической прогрессии: 
, где 
— первый член прогрессии, 
— последний член, 
—разность прогрессии.
