Math, asked by buke, 1 year ago

formula for add of  1+2+3+4+5+6+7+8+9

Answers

Answered by man
3
Formula for A.P. Sn=9/2[10]=45
Answered by Anonymous
2

Sum of n natural no . = n ( n+1)/2

                                     = 9 x 10/2 = 45.



Thank u.

Similar questions