Jawab:
Penjelasan dengan langkah-langkah:
a+ar=72
a(1+r)=72
a=72/1+r
a +ar +ar^2 +ar^3 =80
72 +ar^2(1+r) =80
ar^2(1+r) =8
72r^2 =8
r^2 =1/9
r=1/3
a=54
U6= ar^5
= 54(1/3)^5
= 54(1/243)
=54/243
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Jawab:
Penjelasan dengan langkah-langkah:
a+ar=72
a(1+r)=72
a=72/1+r
a +ar +ar^2 +ar^3 =80
72 +ar^2(1+r) =80
ar^2(1+r) =8
72r^2 =8
r^2 =1/9
r=1/3
a=54
U6= ar^5
= 54(1/3)^5
= 54(1/243)
=54/243