Aflati x din:
2x + 4x + ..........+ 100x + 102x = x + 3x + 5x .....+ 101x
eu am incercat asa
x + 2x + 3x + 4x + ......+ 100x + 101x + 102x =
ex clasa V
Re: ex clasa V
2x + 4x + ........+ 100x + 102x -( x + 3x + 5x .....+ 101x) =0
2x + 4x + 6x+.....+ 100x + 102x
- x - 3x - 5x - ........ - 99x - 101x
x*(1+1+1+ ....... +1+1) = 0 => x=0
2x + 4x + 6x+.....+ 100x + 102x
- x - 3x - 5x - ........ - 99x - 101x
x*(1+1+1+ ....... +1+1) = 0 => x=0