if the sum of the first n positive integers is s , what is the sum of the first n positive integers divisible by 3 , in terms of s ?
"answer is d given sum of 1 2 3 . . . . . n = s sum of 3 , 6 , 9 . . . . 3 n = 3 [ sum ( 1 2 3 . . . . n ) ] = 3 s"
negate(const_2)