Question

Given that 1+ 2+ 3+ 4+ 5+ .... +98 +99+100 = 5050,
find 1 +2+3+4+...+
98 + 99 - 100.

Answer 1

using formula I will give you below the for solving this question

n x n + 1 divided by 2

Step-by-step explanation:

hair and is the number of terms you are adding the 1 + 2 + 3 + 4 + dash dash dash dash + 200 ok

for example you are adding one plus two hair year 1 and 2 are the two terms we can take it the two n aur batana so that the n is equal to the 2

now solve this question you will get the three answer as per the oneplus 2

similarly if we are adding one to 99 then and we have to write 99 as a n

99(99+1)\2 -100

=4450-100

=4350