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(x+1 )+(x+2)+......+(x+100)=98x+5050,5

Răspuns :

(x+1)+(x+2)+......+(x+100)= 98x +5050.5

100x + (100*101)/2 = 98x +5050.5
2x +5050 = 5050.5
2x = 0.5
x = 0.25