October 2018 1 122 Report
Jika U1, U2, U3,.... adalah barisan geometri yang memenuhi U3 - U6 = x
dan U2 - U4 = y
maka x / y = ....
A. (r³ - r² -r)/(r - 1)
B. (r³ - r² +r)/(r - 1)
C. (r³ + r² +r)/(r+1)
D. (r³ + r² -r)/(r-1)

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