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V. 4.Ecuatii,inecuatii-nr. nat.

1. Inecuatia 100:x%3e5 are un numar de solutii naturale egal cu # .
5, , ,
2. Solutia ecuatiei 2x%2b6=16 este x = # .
1, , ,
3. Solutia ecuatiei 3(4x-2)%2b2=20 este x = #.
2, , ,
4. Solutia ecuatiei (1%2b2%2b...%2b20%2bx) : (1%2b2%2b...%2b10) = 4 este x= # .
10, , ,
5. Solutia ecuatiei x%2b2x%2b3x=1%2b2%2b3 este x = # .
6, , ,
6. Cate numere naturale nenule x verifica inecuatia 5x%2b1%3c36 ?
0 si 2, 1 si 2, 1 si 3,
7. ECUATII, INECUATII, PROBLEME (adunarea,scaderea,inmultirea, impartirea nr. naturale)
19, 20, 25, 21,
8. Calculati suma 1%2b 2%2b ...%2b 1000
interactive learning , ,
9. Calculati suma 2%2b4%2b...%2b 400 .
, ,
10. Valorile naturale ale lui x care verifica inecuatia 2(x-1)%2b20:10 %3c 4 sunt :
15, online , ,