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Bella301
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0.(1)+0.(2)+0.(3)+...+0.(8)=???
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Răspuns :

Renatemambouko
0.(1)+0.(2)+0.(3)+...+0.(8)=1/9+2/9+3/9+...+8/9=1/9(1+2+3+...8)=
=1/9(1+2+3+...8)=1/9 × (8×9)/2=  8/2= 4
0.(1)+0.(2)+0.(3)+...+0.(8)=
=[tex] \frac{1}{9} + \frac{2}{9} + ... + \frac{8}{9}
 = \frac{(1+2+...+8)}{9} = \frac{8*9:2}{9} = \frac{36}{9} = 4 [/tex]

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