Question

sum of the serial nos 1 to 50

Answer 1

Hi Friend !!!

Here is ur answer !!

a = 1 , n, 50 , an = 50

Sn = n/2 ( a+an)

= 50/2 (1+50)

= 25(51)

= 1275


Hope it helps u :-)

Answer 2

There’s a formula to calculate the sum of the first n natural numbers:

(n(n+1))/2

Let’s take n=3 as an example; we know that 1+2+3 = 6. Let’s put it in the equation to check whether the equation works:

(3(3+1))/2

=(3(4))/2

=(12)/2

=6

Now that we know it works, we take n as 50:

(50(50+1))/2

=(50(51))/2

=(2550)/2

=1275

So, the sum of the first 50 natural numbers is 1275