Question

Сумма от 1 до 199 с решением

Answer 1

Арфим. прогрес.
a1=1
d=1
an=199
199=1+1(n-1)
n-1=188
n=199
S=(1+199)/2*199=100*199=19900
Ответ: 19900

Answer 2

To find the sum of integers from 1 to 199, you can use the formula for the sum of an arithmetic series:

Sum = (n/2) * (first term + last term)

where: n = number of terms first term = 1 last term = 199

First, calculate the number of terms (n): n = last term - first term + 1 n = 199 - 1 + 1 n = 199

Now, plug the values into the formula:

Sum = (199/2) * (1 + 199) Sum = (199/2) * 200 Sum = 199 * 100 Sum = 19900

So, the sum of integers from 1 to 199 is 19,900.