Question

BISMILLAH (Salam Math Lovers)
Goyang Otak Malam Anda..Soal OSK SMA Legit nih
Are You Ready?
@ Monggo @

Answer 1

A + b + c = 54
abc = 8000
b = ar
c = ar²
substitusi:
a(ar)(ar²) = 8000
(ar)³ = 8000
ar = 20 = b

a + b + c = 54
a + 20 + c = 54
a + c = 34

Answer 2

Barisan geometri :
a , ar , ar²
hasil kali = (ar)³ = 8000
                  ar = 20  
                   ar = b
a + b + c = 54
a + c = 54 - 20
a + c = 34