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turun a=1 b=3/4
naik a=3/4 b=3/4
S∞ =a/1-r =1/1-3/4 => 4
s∞ =a/1-r=3/4/(1-3/4) => 3
hadi 3+4 = 7
kita cari lintasan bola saat jatuh bebas.
a = 1 a:(1-r) = 1:( 1-3/4) = 1:1/4 = 4 meter.
r = 3/4
lalu, kita cari lintasan bola ketika memantul ke atas.
a = 3/4 a:(1-r) = 3/4:( 1- 3/4) = 3/4 : 1/4 = 3 meter.
r = 3/4
dan, total lintasan bola = 4 meter + 3 meter = 7 meter.