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log 2=a 
log 7=b ise
log 25 tabanında 392 nin a ve b cinsinden eşiti nedir? 

Sagot :

log25tabanında 392=(log 392)/(log25)=(log 49.8)/(log (100:4))

 

=(log49+log8)/(log100-log4)=(log7^2+log2^3)/(log10^2-log2^2)

=(2log7+3log2)/(2log10-2log2)=(2b+3a)/(2-2a)

 

(^:üssü demek)

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