Question

Find the sum of first natural 50 numbers. Find the sum of first 50 even number compare them? ​

Answer 1

sum of first n natural no = n (n+1) /2

50*51/2

sum of first 50 even no.

2 n (n+1)/2 (taking out 2 common)

n (n+1) = 50*51

so by this we can clearly see that it if twice of the sum of n natural no.s

HOPE IT WOULD BE HELPFUL