Question

Faceți va rog acest exercițiu repede. DAU COROANĂ!!!
(x+1)+(x+2)+(x+3).....+(x+100)=1990+406x​

Answer 1

Răspuns:

(x+1)+(x+2)+(x+3)+....+(x+100)=1990+406x

100x+(1+2+3+...+100)=1990+406x

1+2+3+...+100=100×101:2

=10100:2

=5050

100x+5050=1990+406x

306x=3060 /:306

x=10

Answer 2

x+x+x..x( de 100 ori) =100x

1+2+...100=

100x101:2=5050

Avem urmatoarea ecuatie

1990+406x=5050+100x

Calculam

406x=5050-1990+100x

406x=3060+100x

306x=3060

x=3060:306

x=10

Sper din suflet ca te-am ajutat!

Bafta.