Question

Sn = n/2 (60n - 60)​

Answer 1

Step-by-step explanation:

$sn = \frac{n}{2} (60n - 60) \\ \\ sn =( \frac{n}{2} \times 60n)( \frac{n}{2} \times - 60) \\ \\ sn = 30 {n}^{2} \times - 30n \\ \\ sn = - 900n {}^{3}$

I hope it helps you

Answer 2

LKPB42-LXTAL-RASGO I kno it is correct explanation