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Violetta3
a fost răspuns

Sa se rezolve in N:
x+2x+3x+ . . . +29x=1+2+3+ . . . +600

Răspuns :

Veronica0
x(1+2+...+29)=1+2+..+600
x(29*30)/2=600*601/2
435x=180300
x=414.48
Stefaniablidea
X(1+2+3+.........+29)=1+2+3+4+............+600
1+2+3+...........+29=29 x 30:2=870:2=435
1+2+........+600=600 x 601:2=360 600:2=180 300
X x 435=180 300
X=414,4