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a fost răspuns

Rezolvati ecuatia:x+2x+3x+...+100x=50500.

Răspuns :

[tex]x+2x+3x+...+100x=50500\\ x(1+2+3+..+100)=50500\\ x*\frac{100*101}{2}=50500\\ x*50*101=50500\\ x*5050=50500\\ x=10 [/tex]

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