the number of natural numbers n such that ( n + 1 ) ^ 2 / ( n + 7 ) is an integer , is ?
we can use ( n + 1 ) ^ 2 greater than ( n + 7 ) which gives n > 2 , - 3 . . . . . . . . now there are four integers - 2 . - 1 , 01 in between - 3 and 2 . so answer is 4 . answer : a
subtract(7, const_3)