if the sum of the first n positive integers is s , what is the sum of the first n positive integers divisible by 5 , in terms of s ?
"answer is e given sum of 1 2 3 . . . . . n = s sum of 5 , 10 , 15 . . . . 5 n = 5 [ sum ( 1 2 3 . . . . n ) ] = 5 s"
negate(const_2)