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√3 +√12 + √27+ √48 +...+ √300 efectuati

Răspuns :

[tex] \sqrt{3} +2 \sqrt{3} +3 \sqrt{3} +....+10 \sqrt{3} = \\ \sqrt{3}(1+2+3+...+10)= \\ \sqrt{3} * \frac{10*11}{2} = \\ 55 \sqrt{3}[/tex]