mohon dibantu jawab yah!

a = 6
Un = 96
n = 5

Un = a.r^n-1
96 = 6.r^5-1
96 = 6.r^4
r^4 = 96/6
r^4 = 16
r = ⁴√16
r = 2

Sn = a(r^n - 1)/r-1
= 6(2^5 -1)/2-1
= 6(2^5 - 1)/1
= 6(32-1)
= 6(31)
= 186

Maaf ya klo salah udh agak lupa :v