1.if the sum of all the positive integers from 1 to 1000, inclusive, is s, what is the sum of all the positive integers from 1 to 2000?
답 1000000 +2S
2.which of the following must be true about the product of a positive number greater than 1 and a negative number less than -2?
a) it is a negative integer
b) it is a negative number less than -2
c) it is a negative number greater than -2
답 b
2번은 수에 대한 정의가 없으므로 양수가 될수 있는것 아닌가요??
이문제 풀이좀 해주세요 ㅠㅠ