berarti
U1 + U2 + U3 = 3.log a
a + a + b + a + 2b = 3.log a
3a + 3b = 3.log a
a + b = log a
U2 = log a
beda =
U2 - U1 = U3 - U2
log a - log 100 = 3/2 log a - log a
log a - 2 = 1/2 log a
log a - 1/2 log a = 2
1/2 log a = 2
log a = 4
U2 = 4
U1 = 2
U3 = 3/2.4 = 6
U4 = 8
jumlah = 2+4+6+8 = 20
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berarti
U1 + U2 + U3 = 3.log a
a + a + b + a + 2b = 3.log a
3a + 3b = 3.log a
a + b = log a
U2 = log a
beda =
U2 - U1 = U3 - U2
log a - log 100 = 3/2 log a - log a
log a - 2 = 1/2 log a
log a - 1/2 log a = 2
1/2 log a = 2
log a = 4
U2 = 4
U1 = 2
U2 = 4
U3 = 3/2.4 = 6
U4 = 8
jumlah = 2+4+6+8 = 20