Find the sum of first n terms.
Posted: Wed Jul 13, 2022 8:10 pm
a) \(\frac{n(n+1)}{2}\)
b) \((\frac{n(n+1)}{2})^3\)
c) \(\frac{n(n+1)(2n+1)}{6}\)
d) \((\frac{n(n+1)}{2})^2\)
b) \((\frac{n(n+1)}{2})^3\)
c) \(\frac{n(n+1)(2n+1)}{6}\)
d) \((\frac{n(n+1)}{2})^2\)