Answer:
998,001
Step-by-step explanation:
Sum (S) of n terms in an arithmetic sequence is given by;
[tex]S_{n}[/tex] = [tex]\frac{n}{2}[/tex](2a + d(n-1)) , where d is the common difference
[tex]S_{999}[/tex] = [tex]\frac{999}{2}[/tex](2 + 2(999-1)) = 998,001
