Question

25. Sum of first n natural
number is​

Answer 1

Answer:

$\boxed{\huge\underline{\mathscr\purple{♡ANSWER♡}}}$

(｡◕‿◕｡)➜

$\boxed{\huge{\mathscr\red{ Thank \:You }}}$

☺️what is the question

??

Answer 2

Sum of First n Natural Numbers.

We prove the formula 1+ 2+ ... + n = n(n+1) / 2, for n a natural number.

sum = n/2 (2a +(n-1)d)

here put d = 1

hope this helps , marks as brainliest , drop in a thanks xx