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fie a=1/2+1/2+1/4+...+1/2018 si b= 1/2+2/3+3/4...+2017/2018. Calculati a+b

Răspuns :

Răspuns:

Explicație pas cu pas:

a=1/2+1/3+1/4+...+1/2018

b= 1/2+2/3+3/4...+2017/2018

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a+b=(1/2+1/2)+(1/3+2/3)+........+(1/2018+2017/2018)=

     =1+1+......................+1    (de 2018 ori)

a+b=2018