u1=a=3 , suku terahir=96 . n=6 karena jumlahnya 6 berarti u6=96.
dit: s6=...?
sn= a((r^n)-1)/r-1
cari r nye terlebih dahulu
u6/u1 = 96/3
ar^5/a=32
r^5=32
akar5 dari r^5 = akar5 dari 32
r = 2
sn= a((r^n) - 1/r-1
s6 = 3 . (2^6 - 1) / 2-1
s6= 3 . (64-1)/1
s6= 3 . 63
s6 = 189
jawabannya : D
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Verified answer
JawabannyaD. 189
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u1=a=3 , suku terahir=96 . n=6 karena jumlahnya 6 berarti u6=96.
dit: s6=...?
sn= a((r^n)-1)/r-1
cari r nye terlebih dahulu
u6/u1 = 96/3
ar^5/a=32
r^5=32
akar5 dari r^5 = akar5 dari 32
r = 2
sn= a((r^n) - 1/r-1
s6 = 3 . (2^6 - 1) / 2-1
s6= 3 . (64-1)/1
s6= 3 . 63
s6 = 189
jawabannya : D