[toán 9] CASIO

H

huy14112

Ta có :

$0,262826282628...=0,(2628)=0,(1).2628=\dfrac{1}{9}.2628=\dfrac{2628}{9}=292$

$\dfrac{584}{0,262826282628...}=\dfrac{584}{292}=2$

Vậy $ \dfrac{584}{0,262826282628...}+\dfrac{584}{0,262826282628...}+\dfrac{584}{0,262826282628...}=2+2+2=6$

$\longrightarrow đpcm$
 
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