ex 4dau coronița va rog ajutatima ma .... Idea question from @balcangina2320

July 2021 1 11 Report

ex 4
dau coronița
va rog ajutatima ma

Răspuns:

Explicație pas cu pas:

$\frac{1,(8)+2,(7)+...+8,(1)}{1,2(3)+2,3(4)+...+8,1(2)}= \frac{36,(36)}{36,36(36)} = \frac{\frac{3600}{99} }{\frac{360000}{9900} } = \frac{3600}{99}* \frac{9900}{360000} = \frac{100}{100}=1$

Am folosit formula lui gauss pentru suma 1+2+3+....+8 = (1+8)*8/2 = 9*4=36

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