Logarithmen 18

Bestimme den Numerus, wenn die Basis in der Klammer steht.
log(4) x = 2
log(3) x = 5
log(7) x = 2
log(3) x = 3
log(11) x = 2
log(12) x = 2
log(10) x = 2
log(2) x = 2
log(4) x = 4
log(13) x = 2
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