Question

solve 3 question with steps plz frnds

Answer 1

$S_n = 1^3 + 2^3 + 3^3 + ...... + n^3 \\ \\ = (\frac{n(n + 1)}{2})^2 \\ \\ = (1 + 2 + 3 + ...... + n)^2 \\ \\ = (T_n)^2 \\ \\ \\ Option\ (2)\ is\ the\ answer.$