Question

find the sum of first 9 positive integers

Answer 1

First 9 positive integers = 1,2,3,4,5,6,7,8 and 9

Their sum = 1+2+3+4+5+6+7+8+9 = 45

Answer 2

Answer:

45 is correct answer

Step-by-step explanation:

formula is n(n+1)/2