Jawabanmu

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2014-01-18T00:47:13+07:00
2014-01-18T06:53:42+07:00
U5/u3=324/36 = r^4/r^2=9 = r= 3

u3/u2= r sehingga u2 = u3/r = 36/3 = 12
u2/u1=r sehingga u1= u2/r = 12/3 = 4

s6 = a(r^6 - 1) / r-1 = 4(3^6-1)/ 3-1 = 4.728/2 = 1456

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