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Verified answer
Kelas 8 MatematikaBab Barisan dan Deret Bilangan
^ = pangkat
r = ^(5 - 1)√(U5 / U1)
r = ^4√(324/4)
r = ^4√81
r = 3
Sn = a . (r^n - 1)/(r - 1)
S5 = 4 . (3^5 - 1)/(3 - 1)
S5 = 4 . (243 - 1)/2
S5 = 2 . 242
S5 = 484 cm