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

1. Solutia ecuatiei x%2b2x%2b3x=1%2b2%2b3 este x = # .
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2. Daca 7a%2b3b=85 si a=2b, atunci a %2b b = # .
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3. Solutia ecuatiei 2x%2b6=16 este x = # .
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4. Cate numere naturale nenule x verifica inecuatia 5x%2b1%3c36 ?
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5. Calculati suma 1%2b 2%2b ...%2b 1000
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6. ECUATII, INECUATII, PROBLEME (adunarea,scaderea,inmultirea, impartirea nr. naturale)
0 si 1, 0 si 2, 1 si 2, 1 si 3,
7. Inecuatia 100:x%3e5 are un numar de solutii naturale egal cu # .
19, 20, 25, 21,
8. Solutia ecuatiei (1%2b2%2b...%2b20%2bx) : (1%2b2%2b...%2b10) = 4 este x= # .
500500, , ,
9. Solutia ecuatiei 3(4x-2)%2b2=20 este x = #.
40200, print quizzes , mix questions ,
10. Calculati suma 2%2b4%2b...%2b 400 .
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