Question

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Answer 1

Răspuns:

Explicație pas cu pas:

1/1·2=1/1-1/2

1/2·3=1/2-1/3

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1/24·25=1/24-1/25

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∑1=1-1/25

similar   a doua suma ∑2=1/25-1/50

n=√1/2·47·[1-1/25-1/25+1/50]=√1/94(1-1/50+1/50)=√1/94=