Question

What is the sum of all natural number form 1 to 100?

Answer 1

a= 1, d=1 , l=100

l= a+(n-1)d

=>100= 1+(n-1)1

=>n=100

S= n/2[a+l]

= 100/2[1+100]

=5050

Answer 2

Answer:

5050

Step-by-step explanation:

formula used

S=n(n+1)/2

S=100(100+1)/2

S= 100x 101/2

S= 5050