Question

which of the following statements are true,
1) 1+3+5....+n=2n^2
2)a^3+2^3+3^3+.....+n=1/4n^2(n+1)^2
1, 2, both, neither

Answer 1

Assuming the second is cubes 1 to n

1 is false - (n+1)^2 and 2 is true.