Question

Derivation of sum of first n natural numbers is n(n+1)/2

Answer 1

Answer:

■ DERIVATIVE : n + 1/2

Step-by-step explanation:

Here is equation is = n ( n + 1 ) / 2

= n²/2 + n/2

Now derivative as follows....

》》 d/dn (n²/2 + n/2 )

》》 2 x n / 2 + 1/2

》》 n + 1/2

■ DERIVATIVE : n + 1/2