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Jawabmisal 3 bilangan itu
a/r , a. ar
hasilkali = 216
a/r (a)(ar) = 216
a³ = 216
a= 6
6/r + 6 + 6r = 26
6/r + 6r = 20...kalikan r
6+ 6r²= 20 r
6r² - 20r + 6= 0
3r² - 10 r + 3 = 0
(3r - 1)(r - 3)= 0
r = 1/3 atau r = 3
jika r = 3
bilangan itu = 6/r , 6, 6r = 2, 6, 18