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maka
dan
sehingga
x = ar^2 - ar^5
x = ar^2(1 - r^3)
y = U2 - U4
y = ar - ar^3
y = ar(1 - r^2)
x/y = [ar^2(1 - r^3)]/[ar(1 - r^2)]
x/y = [r(1 - r^3)]/[(1 - r^2)]
x/y = [r(-)(r-1)(r^2 + r + 1)]/[(1 + r)(1 - r)]
x/y = [r(1 - r)(r^2 + r + 1)]/[(1+r)(1-r)]
x/y = [r(r^2 + r + 1)]/(1+r)
x/y = (r^3 + r^2 + r)/(1 + r)
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