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Igor11234
@Igor11234
December 2019
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Dado o log2=a e log3=b calcule log 20
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marcia2017
20 2
10 2
5 5 log10
1 log5= --------
log 2
log5=log10/2
log 20= log(2².5)= log2²+log5= 2log2+log 5⇒2.a+ log 10 -log2
⇒2.a+1-a= 2a-a+1=a+1
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10 2
5 5 log10
1 log5= --------
log 2
log5=log10/2
log 20= log(2².5)= log2²+log5= 2log2+log 5⇒2.a+ log 10 -log2
⇒2.a+1-a= 2a-a+1=a+1