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Verified answer
R= rasio5/2 x r^3 = 20
r^3 = 8
r= 2
suku ke 6= 5/2 x r^5
= 80.
= (U4 - U1)/(4-1)
= (20 - 5/2)/3
= (20 -2,5)/3
= 17,5/3
= 5 5/6
a = 5/2
Jawab:
U6 - U4 = 6 - 4 = 2
Un = U4 + 2.r
U6 = 20 + 2.5 5/6
U6 = 20 + 2.35/6
U6 = 20 + 70/6
U6 = 120/6 + 70/6
U6 = 190/6
U6 = 31 4/6
U6 = 31 2/3
Jadi suku ke 6 adalah 31 2/3
#jangan lupa 5 bintang