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\LogIdenIIRev{b}

Om man beräknar logaritmen av en potens som har samma bas som logaritmen, blir värdet exponenten på potensen, t.ex. Detta gäller även åt andra hållet, dvs. vi kan skriva
Denna regel gäller för positiva tal a. Man kan säga att "b upphöjt till" och "" tar ut varandra.

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